{"product_id":"caplugs-300-3532-p20-hdpe-screw-cap-20ml-vial-30ml-centrifuge-tube-pink","title":"20 mL Centrifuge Tubes, Screw Caps, HDPE, Pink — 300-3532-P20 | 1000\/Bag | Caplugs® Evergreen","description":"\u003ch2\u003e20 mL Vial \u0026amp; 30 mL Centrifuge Tube Screw Caps — HDPE, Pink, 1000\/Bag (300-3532-P20)\u003c\/h2\u003e\n\u003cp\u003eThese pink High-Density Polyethylene (HDPE) screw caps from Caplugs® Evergreen are designed to fit 20 mL screw-neck vials and 30 mL centrifuge tubes, supplying a secure threaded closure for clinical, biorepository, and centrifugation workflows. Part number 300-3532-P20 ships 1000 caps per bag and delivers IATA P650 compliant leak-free sealing, −80 °C cryogenic stability, and autoclave compatibility at 121 °C — making these caps suitable for the full specimen lifecycle from collection through frozen archive. The pink color is a recognized convention in pediatric specimen programs, enabling immediate visual differentiation of pediatric-derived tubes in multi-patient-type processing environments.\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\u003e300-3532-P20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCap Type\u003c\/td\u003e\n\u003ctd\u003eScrew cap — threaded engagement\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\u003ePink\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Compatibility\u003c\/td\u003e\n\u003ctd\u003eCaplugs® Evergreen 20 mL screw-neck vials; 30 mL centrifuge tubes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThread Note\u003c\/td\u003e\n\u003ctd\u003eLarger thread than 300-3010\/300-3022 family — not interchangeable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIATA P650\u003c\/td\u003e\n\u003ctd\u003eCompliant — leak-free primary container seal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCryogenic Storage\u003c\/td\u003e\n\u003ctd\u003eCompatible to −80 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAutoclave Compatibility\u003c\/td\u003e\n\u003ctd\u003e121 °C \/ 15 psi\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\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\u003e1000\/Bag\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCountry of Origin\u003c\/td\u003e\n\u003ctd\u003eUSA (California)\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\u003e\n\u003cstrong\u003ePediatric specimen programs:\u003c\/strong\u003e Pink cap convention enables immediate visual identification and routing of pediatric-derived tubes for age-appropriate reference range interpretation in multi-patient-type workflows.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e20 mL vial capping:\u003c\/strong\u003e Threaded HDPE engagement provides a secure, leak-free closure on Caplugs® Evergreen 20 mL screw-neck vials for sample storage and transport.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e30 mL centrifuge tube capping:\u003c\/strong\u003e Screw-thread design retains the cap through centrifuge forces while maintaining IATA P650 compliant leak-free integrity during transport.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBiorepository and frozen archive:\u003c\/strong\u003e HDPE cryo stability to −80 °C supports long-term biorepository storage of clinical and research specimens.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor-coded batch routing:\u003c\/strong\u003e Pink caps integrate into multi-color specimen classification systems; the 300-3532 range offers 14 additional solid colors at identical thread specifications for a complete routing vocabulary.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplacement cap supply:\u003c\/strong\u003e Provides exact-thread replacement caps for existing Caplugs® Evergreen 20 mL and 30 mL tube inventories.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThese caps are engineered to fit the Caplugs® Evergreen 20 mL screw-neck vial and 30 mL centrifuge tube families. It is important to note that the 300-3532 series uses a larger thread specification than the 300-3010 and 300-3022 cap families designed for 15 mL tubes — the two thread sizes are not interchangeable. Laboratories transitioning from a 15 mL format or evaluating a new color routing system should validate cap-to-tube thread fit with a sample quantity before placing a bulk order. An assorted-color pack (300-3532-X20) is available for color routing trials.\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\u003eAqueous buffers and saline\u003c\/td\u003e\n\u003ctd\u003eExcellent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDilute acids and bases\u003c\/td\u003e\n\u003ctd\u003eExcellent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEthanol and isopropanol\u003c\/td\u003e\n\u003ctd\u003eGood — suitable for most lab concentrations\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\u003ctr\u003e\n\u003ctd\u003eAromatic solvents (toluene, xylene)\u003c\/td\u003e\n\u003ctd\u003eNot recommended\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCryogenic storage (−80 °C)\u003c\/td\u003e\n\u003ctd\u003eCompatible\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\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eQuality \u0026amp; Procurement\u003c\/h2\u003e\n\u003cp\u003eMade in USA at Caplugs® Evergreen's California manufacturing facility, these screw caps are produced from BPA-free, phthalate-free HDPE resin under ISO 9001 quality management. The IATA P650 compliant closure design meets international requirements for leak-free transport of primary containers, supporting clinical and biorepository programs that ship specimens between facilities. LabSupplies.com is an authorized Caplugs® Evergreen dealer shipping from USA inventory, with tiered volume pricing available for hospitals, research institutions, and biotech procurement teams managing high-throughput tube programs.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWill these caps fit my existing 15 mL centrifuge tubes?\u003c\/strong\u003e\u003cbr\u003eNo. The 300-3532 series uses a larger thread specification than the 300-3010 and 300-3022 cap families designed for 15 mL tubes. These caps are intended exclusively for Caplugs® Evergreen 20 mL screw-neck vials and 30 mL centrifuge tubes. Confirm your tube format before ordering.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eAre these caps sterile?\u003c\/strong\u003e\u003cbr\u003eNo — they are supplied non-sterile in 1000\/Bag packaging. For workflows requiring sterile closures, contact your LabSupplies.com account representative to discuss available options.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan these caps be autoclaved or used for frozen storage?\u003c\/strong\u003e\u003cbr\u003eYes on both counts. The HDPE construction is autoclave compatible at 121 °C \/ 15 psi and maintains cryogenic stability to −80 °C, making these caps suitable from initial specimen processing through long-term frozen biorepository archiving.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhy use a pink cap specifically?\u003c\/strong\u003e\u003cbr\u003ePink is a widely adopted color convention in clinical lab workflows to designate pediatric-derived specimens. Using a visually distinct cap color allows processing staff to immediately identify and route pediatric tubes for age-appropriate reference range interpretation without relying solely on labeling — reducing routing errors in high-volume multi-patient-type environments.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\/\",\"@type\":\"Product\",\"name\":\"20 mL Vial \u0026 30 mL Centrifuge Tube Screw Caps — HDPE, Pink, 1000\/Bag\",\"sku\":\"300-3532-P20\",\"mpn\":\"300-3532-P20\",\"brand\":{\"@type\":\"Brand\",\"name\":\"Caplugs® Evergreen\"},\"material\":\"High-Density Polyethylene (HDPE)\",\"color\":\"Pink\",\"offers\":{\"@type\":\"Offer\",\"priceCurrency\":\"USD\",\"price\":\"114.28\",\"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 existing 15 mL centrifuge tubes?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No. The 300-3532 series uses a larger thread specification than the 300-3010 and 300-3022 cap families designed for 15 mL tubes. These caps are intended exclusively for Caplugs® Evergreen 20 mL screw-neck vials and 30 mL centrifuge tubes. Confirm your tube format before ordering.\"}},{\"@type\":\"Question\",\"name\":\"Are these caps sterile?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No — they are supplied non-sterile in 1000\/Bag packaging. For workflows requiring sterile closures, contact your LabSupplies.com account representative to discuss available options.\"}},{\"@type\":\"Question\",\"name\":\"Can these caps be autoclaved or used for frozen storage?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes on both counts. The HDPE construction is autoclave compatible at 121 °C \/ 15 psi and maintains cryogenic stability to −80 °C, making these caps suitable from initial specimen processing through long-term frozen biorepository archiving.\"}},{\"@type\":\"Question\",\"name\":\"Why use a pink cap specifically?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Pink is a widely adopted color convention in clinical lab workflows to designate pediatric-derived specimens. Using a visually distinct cap color allows processing staff to immediately identify and route pediatric tubes for age-appropriate reference range interpretation without relying solely on labeling — reducing routing errors in high-volume multi-patient-type environments.\"}}]}\u003c\/script\u003e","brand":"Caplugs® Evergreen","offers":[{"title":"Default Title","offer_id":48567914496232,"sku":"300-3532-P20","price":114.28,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0694\/5361\/1240\/files\/300-3532-P20_02.jpg?v=1779073807","url":"https:\/\/labsupplies.com\/products\/caplugs-300-3532-p20-hdpe-screw-cap-20ml-vial-30ml-centrifuge-tube-pink","provider":"LabSupplies.com","version":"1.0","type":"link"}