{"product_id":"caplugs-300-3910-f020-mst-flat-top-cryogenic-vial-caps-hdpe-natural","title":"Cryo Vial Caps, HDPE, Natural — 300-3910-F020 | 200\/Bag | Caplugs® Evergreen","description":"\u003ch2\u003eFlat Top MST™ Cryogenic Vial Caps, HDPE, Natural — 300-3910-F020 | 200\/Bag\u003c\/h2\u003e \u003ctable\u003e \u003cthead\u003e\u003ctr\u003e\u003cth colspan=\"2\"\u003eQuick Reference — 300-3910-F020\u003c\/th\u003e\u003c\/tr\u003e\u003c\/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eSub-brand\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eMST™ (Caplugs® Evergreen)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eCap Profile\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eFlat Top — distinct from CryoSure® dome-top caps\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eHigh-Density Polyethylene (HDPE)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eColor\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eNatural\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eCryo Rating\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e✓ LN₂ vapor phase (-196°C) and immersion\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003evs CryoSure®\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eMST™: flat top; CryoSure®: dome top — different vial threads\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eUnique colors\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eChocolate (FM20) and Amber (FN20) exclusive to MST™ range\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eAutoclave\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e✓ Compatible (121°C)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003ePack Size\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e200\/Bag\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003ePrice\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e$19.78 \/ Bag ($0.0989 \/ cap)\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e \u003ch2\u003eTechnical Narrative\u003c\/h2\u003e \u003cp\u003eThe Caplugs® Evergreen MST™ is a natural HDPE flat-top cryogenic vial cap for MST™ cryogenic vials — the flat-profile variant of the Caplugs® Evergreen cryo vial cap range. The defining difference from CryoSure® caps (300-3900 series) is the cap profile: MST™ caps have a flat top surface; CryoSure® caps have a dome top. The flat profile provides two workflow advantages: (1) improved stacking density in high-density cryo boxes where flat-top caps allow vials to be inverted or stacked with less airspace between layers; (2) more consistent robotic cap engagement in automated cryo vial handling systems that prefer the uniform flat surface for cap-on\/cap-off torque tools. MST™ caps are specific to MST™ vials and are not interchangeable with CryoSure® vials or other vial formats.\u003c\/p\u003e \u003cp\u003eLike CryoSure® caps, MST™ caps are HDPE-engineered for LN₂ vapor phase (-196°C), LN₂ immersion, and -80°C mechanical freezer storage — and are not substitutable with standard HDPE tube caps from the 300-3010\/300-3532\/300-3541 families at LN₂ temperatures. The MST™ color range includes 12 colors at $19.78\/200-bag — including two colors unique to the MST™ line: Chocolate (300-3910-FM20) and Amber (300-3910-FN20). Amber is specifically positioned for light-sensitive specimen protection alongside Black (300-3910-FZ20), providing a second light-attenuating option where full black-out is not required but UV\/visible light attenuation is beneficial.\u003c\/p\u003e \u003cp\u003eAt $19.78 per 200\/Bag — $0.0989 per cap. All 12 MST™ colors at $19.78\/bag. See the complete color table above. Validate cap-to-vial fit with a sample before bulk purchase — MST™ vial thread is specific to the MST™ vial format.\u003c\/p\u003e \u003ch2\u003eTechnical Specifications — Caplugs® Evergreen \u003c\/h2\u003e \u003ctable\u003e \u003cthead\u003e\u003ctr\u003e \u003cth\u003eSpecification\u003c\/th\u003e \u003cth\u003eValue\u003c\/th\u003e \u003c\/tr\u003e\u003c\/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd\u003ePart Number\u003c\/td\u003e \u003ctd\u003e\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eCaplugs Item #\u003c\/td\u003e \u003ctd\u003e3003910F020E1\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eSub-brand\u003c\/td\u003e \u003ctd\u003eMST™ (Caplugs® Evergreen)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eCap Profile\u003c\/td\u003e \u003ctd\u003eFlat Top — not interchangeable with CryoSure® dome-top\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eMaterial\u003c\/td\u003e \u003ctd\u003eHigh-Density Polyethylene (HDPE)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eColor\u003c\/td\u003e \u003ctd\u003eNatural\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eCryo Rating\u003c\/td\u003e \u003ctd\u003eLN₂ vapor phase and immersion (-196°C)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eStorage\u003c\/td\u003e \u003ctd\u003e✓ -80°C and -196°C compatible\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eAutoclave\u003c\/td\u003e \u003ctd\u003e✓ Compatible (121°C \/ 15 psi)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003evs CryoSure®\u003c\/td\u003e \u003ctd\u003eDifferent thread and cap profile — MST™ vials only\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003ePack Size\u003c\/td\u003e \u003ctd\u003e200\/Bag\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eBPA\/Phthalate\u003c\/td\u003e \u003ctd\u003eBPA-free; no phthalate plasticizers\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eCountry of Origin\u003c\/td\u003e \u003ctd\u003eMade in U.S.A. (California)\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e \u003ch2\u003eMST™ Flat Top Cap Application Compatibility\u003c\/h2\u003e \u003cp\u003eThe MST™ flat top cap fits MST™ cryogenic vials for:\u003c\/p\u003e \u003ctable\u003e \u003cthead\u003e\u003ctr\u003e \u003cth\u003eApplication\u003c\/th\u003e \u003cth\u003eUse \/ Storage\u003c\/th\u003e \u003cth\u003eNotes\u003c\/th\u003e \u003c\/tr\u003e\u003c\/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd\u003eCryogenic vial capping (flat top)\u003c\/td\u003e \u003ctd\u003eMST™ cryogenic vials (Caplugs® Evergreen)\u003c\/td\u003e \u003ctd\u003eFlat top profile — different geometry from CryoSure® dome-top\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eLN₂ vapor phase archive\u003c\/td\u003e \u003ctd\u003eBiobank LN₂ vapor phase at -196°C\u003c\/td\u003e \u003ctd\u003eHDPE engineered for LN₂ temperatures\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e-80°C mechanical freezer\u003c\/td\u003e \u003ctd\u003eUltra-low temperature biorepository\u003c\/td\u003e \u003ctd\u003eHDPE cryo stability through -80°C cycling\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eFlat-top cryo box stacking\u003c\/td\u003e \u003ctd\u003eHigh-density cryo box programs\u003c\/td\u003e \u003ctd\u003eFlat top improves stacking efficiency vs dome-top caps\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eAutomated cap handling\u003c\/td\u003e \u003ctd\u003eRobotic cryo vial cap-on\/cap-off programs\u003c\/td\u003e \u003ctd\u003eFlat profile enables consistent robotic cap engagement\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eColor-coded cryo routing\u003c\/td\u003e \u003ctd\u003eMulti-specimen cryo box organization\u003c\/td\u003e \u003ctd\u003e12 colors including unique Chocolate and Amber\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eCell line cryopreservation\u003c\/td\u003e \u003ctd\u003eDMSO-cryoprotected cell line archives\u003c\/td\u003e \u003ctd\u003eHDPE DMSO compatibility at standard cryo concentrations\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eReplacement cap supply\u003c\/td\u003e \u003ctd\u003eReplacing lost\/damaged caps on MST™ vials\u003c\/td\u003e \u003ctd\u003eThread specific to MST™ vial neck — not interchangeable with CryoSure®\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e \u003cp\u003e\u003cem\u003eMST™ caps are for MST™ vials only — not interchangeable with CryoSure® vials. Validate fit with a sample before bulk purchase.\u003c\/em\u003e\u003c\/p\u003e \u003ch2\u003eChemical Resistance — HDPE — MST™ Cryogenic Grade\u003c\/h2\u003e \u003cp\u003eMST™ HDPE maintains integrity from +121°C autoclave through -196°C LN₂.\u003c\/p\u003e \u003ctable\u003e \u003cthead\u003e\u003ctr\u003e \u003cth\u003eReagent \/ Condition\u003c\/th\u003e \u003cth\u003eCompatibility\u003c\/th\u003e \u003c\/tr\u003e\u003c\/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd\u003eLiquid nitrogen (-196°C)\u003c\/td\u003e \u003ctd\u003e✓ Engineered for LN₂ vapor + immersion\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eStorage at -80°C\u003c\/td\u003e \u003ctd\u003e✓ Excellent — HDPE cryo-toughened\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eDMSO (cryoprotectant conc.)\u003c\/td\u003e \u003ctd\u003e✓ Good — 5–10% standard cryo media\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eAqueous cryoprotectants\u003c\/td\u003e \u003ctd\u003e✓ Excellent (FBS, glycerol, Bambanker)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eAutoclave (121°C)\u003c\/td\u003e \u003ctd\u003e✓ Compatible\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eConcentrated organic solvents\u003c\/td\u003e \u003ctd\u003e✗ Not recommended\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e \u003ch2\u003eComplete MST™ Cap Range — 12 Colors\u003c\/h2\u003e \u003cp\u003eAll 12 MST™ colors in 200\/Bag at $19.78. Note Chocolate and Amber — unique to the MST™ range:\u003c\/p\u003e \u003ctable\u003e \u003cthead\u003e\u003ctr\u003e \u003cth\u003ePart Number\u003c\/th\u003e \u003cth\u003eColor\u003c\/th\u003e \u003cth\u003ePrimary Use\u003c\/th\u003e \u003c\/tr\u003e\u003c\/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e\u003cstrong\u003eNatural\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eUniversal \/ label-based ID\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e300-3910-FB20\u003c\/td\u003e \u003ctd\u003eBlue\u003c\/td\u003e \u003ctd\u003eCitrate \/ CLSI blue-top\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e300-3910-FE20\u003c\/td\u003e \u003ctd\u003eOrange\u003c\/td\u003e \u003ctd\u003eSTAT \/ priority cryo batch\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e300-3910-FG20\u003c\/td\u003e \u003ctd\u003eGreen\u003c\/td\u003e \u003ctd\u003eSpecimen-type or batch designation\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e300-3910-FL20\u003c\/td\u003e \u003ctd\u003eLavender\u003c\/td\u003e \u003ctd\u003eEDTA anticoagulant \/ lavender-top\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e300-3910-FM20\u003c\/td\u003e \u003ctd\u003eChocolate\u003c\/td\u003e \u003ctd\u003eSpecialized batch designation\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e300-3910-FN20\u003c\/td\u003e \u003ctd\u003eAmber\u003c\/td\u003e \u003ctd\u003eLight-sensitive specimen protection\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e300-3910-FP20\u003c\/td\u003e \u003ctd\u003eFuchsia\u003c\/td\u003e \u003ctd\u003eGYN \/ anatomic pathology batches\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e300-3910-FR20\u003c\/td\u003e \u003ctd\u003eRed\u003c\/td\u003e \u003ctd\u003eSerum \/ CLSI red-top convention\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e300-3910-FW20\u003c\/td\u003e \u003ctd\u003eWhite\u003c\/td\u003e \u003ctd\u003eHigh-contrast label surface\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e300-3910-FY20\u003c\/td\u003e \u003ctd\u003eYellow\u003c\/td\u003e \u003ctd\u003eSPS\/ACD \/ CLSI yellow-top\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e300-3910-FZ20\u003c\/td\u003e \u003ctd\u003eBlack\u003c\/td\u003e \u003ctd\u003eLight-sensitive specimen protection\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e \u003ch2\u003eLaboratory Applications\u003c\/h2\u003e \u003cp\u003eMST™ serves biobank programs using MST™ cryogenic vials with flat-top cap preference for cryo box stacking; automated cryo vial handling systems requiring flat-top cap geometry; programs requiring unique color designations (Chocolate, Amber) not available in CryoSure® range; and any MST™ vial program requiring cryo-rated HDPE closure.\u003c\/p\u003e \u003ch2\u003eU.S. Manufacturing, Quality \u0026amp; Institutional Procurement\u003c\/h2\u003e \u003cp\u003eEvery Caplugs® Evergreen lot is precision-molded at our California manufacturing facility. We supply reference laboratories, hospital systems, and federal procurement offices under institutional pricing programs. \u003ca href=\"#request-sample\"\u003eRequest a free sample below\u003c\/a\u003e to validate fit before committing to volume.\u003c\/p\u003e \u003ch2\u003eFrequently Asked Questions — Caplugs® Evergreen \u003c\/h2\u003e \u003ch3\u003eWhat is the difference between MST™ caps (300-3910) and CryoSure® caps (300-3900)?\u003c\/h3\u003e \u003cp\u003eBoth are HDPE cryo-rated cryogenic vial caps from Caplugs® Evergreen, but they are designed for different vial formats and have different cap profiles. MST™ caps (300-3910) have a flat top profile and fit MST™ cryogenic vials. CryoSure® caps (300-3900) have a dome top profile and fit CryoSure® cryogenic vials. The two are not interchangeable — always match the cap series to the vial series.\u003c\/p\u003e \u003ch3\u003eWhat makes Chocolate (FM20) and Amber (FN20) unique to the MST™ range?\u003c\/h3\u003e \u003cp\u003eChocolate (300-3910-FM20) and Amber (300-3910-FN20) are colors available only in the MST™ cap range — not offered in the CryoSure® (300-3900) family. Chocolate provides a distinctive brown color for specialized batch designation in programs that have exhausted the primary CLSI convention colors. Amber provides partial light attenuation — amber-colored HDPE reduces UV and visible light transmission for specimens sensitive to light but where Black caps' complete light blockage is not required. Both expand the MST™ range beyond standard clinical convention colors.\u003c\/p\u003e \u003ch3\u003eAre MST™ caps compatible with LN₂ immersion storage?\u003c\/h3\u003e \u003cp\u003eYes. MST™ HDPE caps are engineered for LN₂ vapor phase (-196°C) and direct LN₂ immersion, equivalent to CryoSure® cap cryo performance. Do not substitute standard HDPE tube caps (300-3010, 300-3532, 300-3541) for LN₂ archive — use only caps specifically engineered for cryogenic temperatures on your cryo vials.\u003c\/p\u003e \u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"Product\",\n  \"name\": \"Flat Top MST\\u2122 Cryogenic Vial Caps, Non-Sterile, High-Density Polyethylene (HDPE), Natural \\u2014 300-3910-F020 | 200\/Bag | Caplugs\\u00ae Evergreen\",\n  \"description\": \"Caplugs\\u00ae Evergreen 300-3910-F020. MST\\u2122 flat top HDPE cryo vial caps, natural, 200\/Bag. Flat profile for stacking. LN\\u2082 + -80\\u00b0C. BPA-free. USA.\",\n  \"sku\": \"3003910F020E1\",\n  \"mpn\": \"300-3910-F020\",\n  \"material\": \"High-Density Polyethylene (HDPE)\",\n  \"color\": \"Natural\",\n  \"brand\": {\n    \"@type\": \"Brand\",\n    \"name\": \"Caplugs\\u00ae Evergreen\"\n  },\n  \"manufacturer\": {\n    \"@type\": \"Organization\",\n    \"name\": \"Caplugs\\u00ae Evergreen\",\n    \"address\": {\n      \"@type\": \"PostalAddress\",\n      \"addressCountry\": \"US\",\n      \"addressRegion\": \"CA\"\n    }\n  },\n  \"offers\": {\n    \"@type\": \"Offer\",\n    \"price\": \"19.78\",\n    \"priceCurrency\": \"USD\",\n    \"availability\": \"https:\/\/schema.org\/InStock\",\n    \"itemCondition\": \"https:\/\/schema.org\/NewCondition\",\n    \"seller\": {\n      \"@type\": \"Organization\",\n      \"name\": \"LabSupplies\"\n    }\n  },\n  \"additionalProperty\": [\n    {\n      \"@type\": \"PropertyValue\",\n      \"name\": \"Sub-brand\",\n      \"value\": \"MST\\u2122\"\n    },\n    {\n      \"@type\": \"PropertyValue\",\n      \"name\": \"Cryo Rating\",\n      \"value\": \"LN\\u2082 vapor + immersion (-196\\u00b0C)\"\n    },\n    {\n      \"@type\": \"PropertyValue\",\n      \"name\": \"Pack Size\",\n      \"value\": \"200 \/ Bag\"\n    },\n    {\n      \"@type\": \"PropertyValue\",\n      \"name\": \"Sterility\",\n      \"value\": \"Non-Sterile\"\n    },\n    {\n      \"@type\": \"PropertyValue\",\n      \"name\": \"Country of Origin\",\n      \"value\": \"United States\"\n    },\n    {\n      \"@type\": \"PropertyValue\",\n      \"name\": \"BPA Free\",\n      \"value\": \"Yes\"\n    }\n  ]\n}\n\u003c\/script\u003e \u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the difference between MST\\u2122 caps (300-3910) and CryoSure\\u00ae caps (300-3900)?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Both are HDPE cryo-rated cryogenic vial caps from Caplugs\\u00ae Evergreen, but they are designed for different vial formats and have different cap profiles. MST\\u2122 caps (300-3910) have a flat top profile and fit MST\\u2122 cryogenic vials. CryoSure\\u00ae caps (300-3900) have a dome top profile and fit CryoSure\\u00ae cryogenic vials. The two are not interchangeable \\u2014 always match the cap series to the vial series.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What makes Chocolate (FM20) and Amber (FN20) unique to the MST\\u2122 range?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Chocolate (300-3910-FM20) and Amber (300-3910-FN20) are colors available only in the MST\\u2122 cap range \\u2014 not offered in the CryoSure\\u00ae (300-3900) family. Chocolate provides a distinctive brown color for specialized batch designation in programs that have exhausted the primary CLSI convention colors. Amber provides partial light attenuation \\u2014 amber-colored HDPE reduces UV and visible light transmission for specimens sensitive to light but where Black caps' complete light blockage is not required. Both expand the MST\\u2122 range beyond standard clinical convention colors.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Are MST\\u2122 caps compatible with LN\\u2082 immersion storage?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. MST\\u2122 HDPE caps are engineered for LN\\u2082 vapor phase (-196\\u00b0C) and direct LN\\u2082 immersion, equivalent to CryoSure\\u00ae cap cryo performance. Do not substitute standard HDPE tube caps (300-3010, 300-3532, 300-3541) for LN\\u2082 archive \\u2014 use only caps specifically engineered for cryogenic temperatures on your cryo vials.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"Caplugs® Evergreen","offers":[{"title":"Default Title","offer_id":48568505401576,"sku":"300-3910-F020","price":19.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0694\/5361\/1240\/files\/300-3910-F020_01.jpg?v=1779115138","url":"https:\/\/labsupplies.com\/products\/caplugs-300-3910-f020-mst-flat-top-cryogenic-vial-caps-hdpe-natural","provider":"LabSupplies.com","version":"1.0","type":"link"}