{"product_id":"caplugs-300-3910-fl20-mst-flat-top-cryo-vial-caps-hdpe-lavender","title":"Cryo Vial Caps, HDPE, Lavender — 300-3910-FL20 | 200\/Bag | Caplugs® Evergreen","description":"\u003ch2\u003eCryo Vial Caps — HDPE, Lavender, Flat Top, MST™ (300-3910-FL20) | 200\/Bag\u003c\/h2\u003e\n\u003cp\u003eThese lavender high-density polyethylene (HDPE) flat-top cryogenic vial caps are part of the Caplugs® Evergreen MST™ line, supplied 200 per bag for high-throughput biobank and biorepository programs. Rated for liquid nitrogen vapor-phase and immersion service down to -196°C as well as -80°C mechanical freezer storage, part number 300-3910-FL20 is a purpose-built replacement and consumable cap for MST™ cryogenic vials. The lavender color mirrors the CLSI H3 lavender-top EDTA tube convention, making these caps the intuitive choice for designating EDTA-preserved specimens — including molecular panels, DNA banking, and whole blood aliquots — within color-coded cryo box programs.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number (MPN)\u003c\/td\u003e\n\u003ctd\u003e300-3910-FL20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSub-brand\u003c\/td\u003e\n\u003ctd\u003eMST™ (Caplugs® Evergreen)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCap Profile\u003c\/td\u003e\n\u003ctd\u003eFlat Top\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eHigh-Density Polyethylene (HDPE)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColor\u003c\/td\u003e\n\u003ctd\u003eLavender\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCryo Rating\u003c\/td\u003e\n\u003ctd\u003eLN₂ vapor phase and immersion (-196°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFreezer Storage\u003c\/td\u003e\n\u003ctd\u003e-80°C compatible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAutoclavable\u003c\/td\u003e\n\u003ctd\u003eYes — 121°C \/ 15 psi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBPA \/ Phthalates\u003c\/td\u003e\n\u003ctd\u003eBPA-free; no phthalate plasticizers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePack Size\u003c\/td\u003e\n\u003ctd\u003e200\/Bag\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCountry of Origin\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCapping MST™ cryogenic vials in LN₂ vapor-phase biobank archives at -196°C\u003c\/li\u003e\n\u003cli\u003eUltra-low temperature (-80°C) mechanical freezer biorepository storage with stable freeze-thaw cycling\u003c\/li\u003e\n\u003cli\u003eColor-coded specimen routing for EDTA-preserved biobank samples (molecular panels, DNA banking, whole blood aliquots) following the CLSI H3 lavender-top convention\u003c\/li\u003e\n\u003cli\u003eHigh-density cryo box programs where the flat-top profile improves box stacking efficiency versus dome-top caps\u003c\/li\u003e\n\u003cli\u003eAutomated robotic cap-on\/cap-off systems where the flat profile enables consistent, repeatable robotic engagement\u003c\/li\u003e\n\u003cli\u003eCell line cryopreservation archives using DMSO-based cryoprotectant media\u003c\/li\u003e\n\u003cli\u003eReplacement cap supply for MST™ vial programs where caps have been lost or damaged\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThese flat-top MST™ caps are designed exclusively for Caplugs® Evergreen MST™ cryogenic vials. The MST™ flat-top profile and thread geometry are distinct from those of CryoSure® dome-top caps — the two cap lines are not interchangeable, and MST™ caps should not be used with CryoSure® vials or other vial formats. Laboratories transitioning from OEM MST™ cap supply or replacing worn caps in an active cryo box program should validate fit with a sample lot before committing to bulk purchase.\u003c\/p\u003e\n\n\u003ch2\u003eChemical Resistance\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eReagent \/ Condition\u003c\/th\u003e\n\u003cth\u003eCompatibility\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eLiquid nitrogen (-196°C)\u003c\/td\u003e\n\u003ctd\u003eExcellent — engineered for LN₂ vapor and immersion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage at -80°C\u003c\/td\u003e\n\u003ctd\u003eExcellent — HDPE cryo-toughened through freeze-thaw cycling\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDMSO (5–10% cryoprotectant concentrations)\u003c\/td\u003e\n\u003ctd\u003eGood — standard cryo media concentrations\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAqueous cryoprotectants (FBS, glycerol, Bambanker)\u003c\/td\u003e\n\u003ctd\u003eExcellent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAqueous buffers \/ saline\u003c\/td\u003e\n\u003ctd\u003eExcellent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAutoclave (121°C \/ 15 psi)\u003c\/td\u003e\n\u003ctd\u003eCompatible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConcentrated organic solvents\u003c\/td\u003e\n\u003ctd\u003eNot recommended\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eQuality \u0026amp; Procurement\u003c\/h2\u003e\n\u003cp\u003eMade in USA, these MST™ caps are manufactured under ISO 9001 quality management from BPA-free, phthalate-free HDPE resin. LabSupplies.com is an authorized Caplugs® Evergreen dealer and ships from USA inventory, making it straightforward to maintain consistent cap supply across active biobank and biorepository programs. Tiered pricing is available for institutional, grant-funded, and high-volume procurement accounts.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWill these caps fit my CryoSure® cryogenic vials?\u003c\/strong\u003e\u003cbr\u003eNo — the MST™ flat-top cap has a distinct thread geometry and profile that is specific to MST™ cryogenic vials. CryoSure® vials use a dome-top cap in a different format, and the two lines are not interchangeable. Always validate cap-to-vial fit with a sample before placing a bulk order.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eAre these caps rated for liquid nitrogen immersion, or only vapor-phase storage?\u003c\/strong\u003e\u003cbr\u003eThese HDPE caps are rated for both LN₂ vapor-phase storage at -196°C and direct LN₂ immersion, as well as -80°C mechanical freezer service.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan these caps be autoclaved before use?\u003c\/strong\u003e\u003cbr\u003eYes — HDPE is autoclave-compatible at standard 121°C \/ 15 psi cycles, so these caps can be sterilized prior to use in cell line cryopreservation or other applications requiring sterile technique.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhy lavender — is this color just aesthetic?\u003c\/strong\u003e\u003cbr\u003eLavender is a deliberate choice that mirrors the CLSI H3 lavender-top EDTA tube convention, providing an intuitive visual cue for EDTA-preserved biobank specimens such as molecular panels, DNA banking samples, and whole blood aliquots in color-coded cryo box programs.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\/\",\"@type\":\"Product\",\"name\":\"Cryo Vial Caps, HDPE, Lavender, Flat Top, MST™ — 200\/Bag\",\"sku\":\"300-3910-FL20\",\"mpn\":\"300-3910-FL20\",\"brand\":{\"@type\":\"Brand\",\"name\":\"Caplugs® Evergreen\"},\"material\":\"High-Density Polyethylene (HDPE)\",\"color\":\"Lavender\",\"offers\":{\"@type\":\"Offer\",\"priceCurrency\":\"USD\",\"price\":\"19.78\",\"availability\":\"https:\/\/schema.org\/InStock\"}}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\/\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Will these caps fit my CryoSure® cryogenic vials?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No — the MST™ flat-top cap has a distinct thread geometry and profile that is specific to MST™ cryogenic vials. 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