{"product_id":"conical-microcentrifuge-tubes-1-8ml-natural-hdpe-2143439020e1","title":"1.8 mL Microcentrifuge Tubes, Tethered Caps, HDPE, Natural — 214-3439-020 | 1000\/Bag | Caplugs® Evergreen","description":"\u003ch2\u003e1.8 mL Conical Microcentrifuge Tubes with Tethered Cap — HDPE, Natural, 1000\/Bag\u003c\/h2\u003e\n\u003cp\u003eThese 1.8 mL conical microcentrifuge tubes feature a permanently attached tethered cap and are molded from natural High-Density Polyethylene (HDPE), supplied non-sterile in sealed 1000\/Bag packaging. The conical bottom geometry concentrates pellets at the tube tip for complete microvolume recovery with minimal dead volume, while the tethered cap eliminates cap loss and cross-contamination risk during high-throughput pipetting. Part number 214-3439-020 is manufactured to lot-to-lot dimensional tolerances that ensure reliable fit in standard microcentrifuge rotor positions across clinical and research settings.\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\u003e214-3439-020\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolume\u003c\/td\u003e\n\u003ctd\u003e1.8 mL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBottom Style\u003c\/td\u003e\n\u003ctd\u003eConical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCap Style\u003c\/td\u003e\n\u003ctd\u003eTethered (permanently attached)\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\u003eNatural\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSterility\u003c\/td\u003e\n\u003ctd\u003eNon-Sterile\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePack Size\u003c\/td\u003e\n\u003ctd\u003e1000\/Bag\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBPA \/ Phthalate Free\u003c\/td\u003e\n\u003ctd\u003eYes\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\u003ePCR preparation and enzyme reactions requiring microvolume conical geometry\u003c\/li\u003e\n\u003cli\u003eDNA and RNA extraction workflows where low dead volume and complete pellet recovery are critical\u003c\/li\u003e\n\u003cli\u003eCell pelleting and microvolume centrifugation in research and clinical laboratories\u003c\/li\u003e\n\u003cli\u003eClinical microvolume sample processing in CAP-, CLIA-, and ISO 15189-accredited labs requiring full lot traceability\u003c\/li\u003e\n\u003cli\u003eShort- and long-term sample storage applications benefiting from HDPE's low moisture vapor transmission\u003c\/li\u003e\n\u003c\/ul\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\u003eAqueous buffers \/ saline\u003c\/td\u003e\n\u003ctd\u003eExcellent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDilute acids\u003c\/td\u003e\n\u003ctd\u003eExcellent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDilute bases\u003c\/td\u003e\n\u003ctd\u003eExcellent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMethanol\u003c\/td\u003e\n\u003ctd\u003eCompatible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsopropanol\u003c\/td\u003e\n\u003ctd\u003eCompatible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAcetonitrile\u003c\/td\u003e\n\u003ctd\u003eCompatible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAromatic solvents (e.g., toluene, xylene)\u003c\/td\u003e\n\u003ctd\u003eNot recommended — verify before use\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 Caplugs® Evergreen microcentrifuge tubes are manufactured from BPA-free, phthalate-free HDPE resin and packaged with lot number and manufacturing date to support full traceability under CAP, CLIA, and ISO 15189 quality requirements. Lot-level quality controls verify consistent conical geometry, wall thickness, and tethered-cap hinge durability across every 1000-tube bag. LabSupplies.com is an authorized Caplugs® Evergreen dealer shipping from domestic USA inventory, so procurement teams avoid the offshore lead-time variability that can disrupt lab operations. Tiered pricing is available for high-volume and grant-funded institutional accounts.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eAre these microcentrifuge tubes sterile?\u003c\/strong\u003e\u003cbr\u003eNo — tubes shipped under part number 214-3439-020 are non-sterile, making them well suited for general molecular biology, cell biology, and clinical chemistry workflows that do not require a sterility guarantee.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat makes a tethered cap better than a separate snap cap?\u003c\/strong\u003e\u003cbr\u003eBecause the cap is permanently attached via a flexible hinge, it cannot be misplaced, mixed with caps from other tube types, or accidentally left off a sample. Single-handed open-and-close operation also reduces interruptions during repetitive high-throughput pipetting runs.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan these tubes be used with standard microcentrifuge rotors?\u003c\/strong\u003e\u003cbr\u003eYes — the 1.8 mL conical format is dimensionally consistent with standard microcentrifuge rotor positions. Lot-to-lot manufacturing controls are maintained to ensure reliable fit across centrifuge models that accept this tube size.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eAre these tubes suitable for regulated clinical laboratories?\u003c\/strong\u003e\u003cbr\u003eYes — every bag ships with a lot number and manufacturing date, providing the chain-of-custody documentation needed for CAP, CLIA, and ISO 15189 accreditation requirements. The HDPE material is BPA-free and phthalate-free, which is increasingly required by hospital and clinical lab procurement policies.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\/\",\"@type\":\"Product\",\"name\":\"1.8 mL Conical Microcentrifuge Tubes with Tethered Cap, HDPE, Natural — 1000\/Bag\",\"sku\":\"2143439020E1\",\"mpn\":\"214-3439-020\",\"brand\":{\"@type\":\"Brand\",\"name\":\"Caplugs® Evergreen\"},\"material\":\"High-Density Polyethylene (HDPE)\",\"color\":\"Natural\",\"offers\":{\"@type\":\"Offer\",\"priceCurrency\":\"USD\",\"price\":\"72.07\",\"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\":\"Are these microcentrifuge tubes sterile?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No — these tubes are non-sterile, making them well suited for general molecular biology, cell biology, and clinical chemistry workflows that do not require a sterility guarantee.\"}},{\"@type\":\"Question\",\"name\":\"What makes a tethered cap better than a separate snap cap?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Because the cap is permanently attached via a flexible hinge, it cannot be misplaced, mixed with caps from other tube types, or accidentally left off a sample. Single-handed open-and-close operation also reduces interruptions during repetitive high-throughput pipetting runs.\"}},{\"@type\":\"Question\",\"name\":\"Can these tubes be used with standard microcentrifuge rotors?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes — the 1.8 mL conical format is dimensionally consistent with standard microcentrifuge rotor positions, and lot-to-lot manufacturing controls ensure reliable fit across centrifuge models that accept this tube size.\"}},{\"@type\":\"Question\",\"name\":\"Are these tubes suitable for regulated clinical laboratories?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes — every bag ships with a lot number and manufacturing date, providing the documentation needed for CAP, CLIA, and ISO 15189 accreditation requirements. The HDPE material is BPA-free and phthalate-free, which is increasingly required by hospital and clinical lab procurement policies.\"}}]}\u003c\/script\u003e","brand":"Caplugs® Evergreen","offers":[{"title":"Default Title","offer_id":48553138815208,"sku":"2143439020E1","price":72.07,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0694\/5361\/1240\/files\/214-3439-020_01.jpg?v=1778693264","url":"https:\/\/labsupplies.com\/products\/conical-microcentrifuge-tubes-1-8ml-natural-hdpe-2143439020e1","provider":"LabSupplies.com","version":"1.0","type":"link"}