{"product_id":"conical-microcentrifuge-tubes-0-4ml-natural-ldpe-2143714020e1","title":"0.4 mL Microcentrifuge Tubes, Conical Bottom, LDPE, Natural — 214-3714-020 | 1000\/Bag | Caplugs® Evergreen","description":"\u003ch2\u003e0.4 mL Conical Microcentrifuge Tubes — LDPE, Natural, Snap Cap, 1000\/Bag\u003c\/h2\u003e\n\u003cp\u003eThese 0.4 mL conical-bottom microcentrifuge tubes are molded from virgin-grade Low-Density Polyethylene (LDPE) and supplied non-sterile in sealed 1000\/Bag packaging for high-throughput bench and clinical workflows. The conical tip geometry concentrates microvolume pellets at the bottom of the tube for complete, low-dead-volume recovery after centrifugation, while the snap cap provides reliable closure for sample storage and transport. Lot-to-lot dimensional consistency ensures a reliable fit in standard microcentrifuge rotor positions across routine laboratory use.\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\u003e214-3714-020\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolume\u003c\/td\u003e\n\u003ctd\u003e0.4 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\u003eSnap Cap\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eLow-Density Polyethylene (LDPE)\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 reaction setup requiring microvolume precision\u003c\/li\u003e\n\u003cli\u003eDNA and RNA extraction with low dead-volume pellet recovery\u003c\/li\u003e\n\u003cli\u003eProtein precipitation and cell pelleting by centrifugation\u003c\/li\u003e\n\u003cli\u003eSample aliquoting and short- or long-term microvolume sample storage\u003c\/li\u003e\n\u003cli\u003eClinical microvolume sample processing in CAP-, CLIA-, and ISO 15189-accredited laboratories\u003c\/li\u003e\n\u003cli\u003eAutomated liquid handling workflows requiring standard 0.4 mL tube geometry\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 \/ isopropanol \/ ethanol\u003c\/td\u003e\n\u003ctd\u003eGood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAcetonitrile\u003c\/td\u003e\n\u003ctd\u003eGood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAromatic solvents (toluene, xylene)\u003c\/td\u003e\n\u003ctd\u003eUse with caution — verify before use\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChlorinated solvents (chloroform, DCM)\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 at Caplugs® Evergreen ISO-certified manufacturing facilities using domestically sourced, FDA-registered virgin-grade LDPE resin, these tubes are free of BPA and phthalates. Each sealed bag carries full lot-number and manufacturing-date traceability to support CAP, CLIA, and ISO 15189 laboratory accreditation documentation. LabSupplies.com is an authorized Caplugs® Evergreen dealer, shipping from USA inventory to eliminate offshore lead-time risk, with tiered pricing available for high-volume institutional and grant-funded 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 — the 214-3714-020 tubes are supplied non-sterile. For most molecular biology, biochemistry, and general sample-processing workflows this is standard practice; DNase\/RNase-free or sterile options should be sourced separately if your protocol requires them.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhy use LDPE instead of polypropylene for microcentrifuge tubes?\u003c\/strong\u003e\u003cbr\u003eLDPE is notably more flexible than polypropylene, which reduces the risk of tube cracking during handling and centrifugation. The flexibility also allows controlled sample dispensing directly through the tube wall in squeeze-transfer techniques. For applications that require autoclaving, however, polypropylene would be the appropriate choice, as LDPE is not autoclavable.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWill these tubes fit standard microcentrifuge rotors?\u003c\/strong\u003e\u003cbr\u003eYes — the conical 0.4 mL format is manufactured to consistent dimensional tolerances for compatibility with standard microcentrifuge rotor positions. If your rotor specifies a particular tube diameter or height, verify against your instrument's documentation before switching from your current supply.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow does the conical bottom help with pellet recovery?\u003c\/strong\u003e\u003cbr\u003eThe tapered conical tip concentrates the pellet at a single defined point at the bottom of the tube, minimizing dead volume and allowing near-complete recovery of small or precious samples after centrifugation — a particular advantage in microvolume DNA\/RNA extraction and cell-pelleting workflows.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\/\",\"@type\":\"Product\",\"name\":\"0.4 mL Conical Microcentrifuge Tubes, LDPE, Natural, Snap Cap — 1000\/Bag\",\"sku\":\"2143714020E1\",\"mpn\":\"214-3714-020\",\"brand\":{\"@type\":\"Brand\",\"name\":\"Caplugs® Evergreen\"},\"material\":\"Low-Density Polyethylene (LDPE)\",\"color\":\"Natural\",\"offers\":{\"@type\":\"Offer\",\"priceCurrency\":\"USD\",\"price\":\"64.04\",\"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 — the tubes are supplied non-sterile. 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