{"product_id":"caplugs-300-3532-x20-hdpe-screw-cap-20ml-vial-30ml-centrifuge-tube-assorted","title":"20 mL Centrifuge Tubes, Screw Caps, HDPE, White — 300-3532-X20 | 1000\/Bag | Caplugs® Evergreen","description":"\u003ch2\u003e20 mL Vial \u0026amp; 30 mL Centrifuge Tube Screw Caps — HDPE, Assorted Colors, 1000\/Bag (300-3532-X20)\u003c\/h2\u003e\n\u003cp\u003eThese Caplugs® Evergreen HDPE screw caps fit 20 mL screw-neck vials and 30 mL centrifuge tubes, supplied as an assorted color mix of 1000 caps per bag. Part number 300-3532-X20 is the ideal entry point for laboratories evaluating a color-coded specimen routing system — every cap in the bag shares the same thread geometry, material specification, and performance ratings as the individual single-color 300-3532 variants, making it easy to trial color assignments before committing to single-color bulk orders. All caps are non-sterile, BPA-free, and rated for both –80 °C cryogenic storage and autoclave sterilization at 121 °C.\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-X20\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\u003eAssorted (mixed colors from 300-3532 range)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Tubes\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 — not interchangeable\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\u003eLeak Compliance\u003c\/td\u003e\n\u003ctd\u003eIATA P650 compliant leak-free closure\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; phthalate-free\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\u003eColor-coded specimen routing — assign a distinct cap color to each specimen type, patient population, or workflow stream across clinical and research labs\u003c\/li\u003e\n\u003cli\u003eCapping and sealing 20 mL screw-neck vials for biorepository archiving and long-term frozen storage at –80 °C\u003c\/li\u003e\n\u003cli\u003eSealing 30 mL centrifuge tubes through centrifugation — threaded engagement retains the cap securely under centrifuge forces\u003c\/li\u003e\n\u003cli\u003ePediatric specimen programs — pink cap convention provides an immediate visual designation for pediatric batch routing\u003c\/li\u003e\n\u003cli\u003eReplacement cap supply for existing 20 mL vial and 30 mL centrifuge tube inventories\u003c\/li\u003e\n\u003cli\u003eTrialing a multi-color routing protocol before transitioning to single-color bulk orders that optimize per-cap cost\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 and bases\u003c\/td\u003e\n\u003ctd\u003eExcellent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAlcohols (ethanol, isopropanol)\u003c\/td\u003e\n\u003ctd\u003eGood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMany organic solvents\u003c\/td\u003e\n\u003ctd\u003eGood — verify with specific solvent before use\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChlorinated \/ aromatic solvents\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 facility, these HDPE screw caps are manufactured from BPA-free, phthalate-free resin under ISO quality management. LabSupplies.com is an authorized Caplugs® Evergreen dealer and ships from USA inventory, typically same business day for stocking items. The assorted-color 300-3532-X20 bag is the lowest-commitment format in the 300-3532 range — once your color routing protocol is established, transitioning to single-color bulk orders is straightforward. Tiered pricing is available for institutional and grant-funded laboratories.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWhat tube sizes do these caps fit?\u003c\/strong\u003e\u003cbr\u003eThese caps are designed for Caplugs® Evergreen 20 mL screw-neck vials and 30 mL centrifuge tubes. They use a larger thread than the 300-3010 and 300-3022 cap families and are not interchangeable with those sizes, so confirm your tube's thread specification before ordering.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan these caps be autoclaved or used for frozen storage?\u003c\/strong\u003e\u003cbr\u003eYes — the HDPE material is compatible with autoclave sterilization at 121 °C \/ 15 psi and with cryogenic storage down to –80 °C. All caps in the assorted bag share the same material and performance ratings as the single-color 300-3532 variants.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat colors are included in the assorted bag, and will they always be the same?\u003c\/strong\u003e\u003cbr\u003eThe bag contains a mix of colors drawn from the 300-3532 range. The specific color distribution may vary between bags — the assorted format is intended for trialing color routing assignments rather than for protocols that require a fixed set of colors. Once you have identified the colors that fit your workflow, single-color bulk orders are available.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eAre these caps sterile?\u003c\/strong\u003e\u003cbr\u003eNo — they are supplied non-sterile. Laboratories requiring sterile closures should autoclave the caps using the 121 °C \/ 15 psi cycle prior to use.\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, Assorted Colors, 1000\/Bag\",\"sku\":\"300-3532-X20\",\"mpn\":\"300-3532-X20\",\"brand\":{\"@type\":\"Brand\",\"name\":\"Caplugs® Evergreen\"},\"material\":\"High-Density Polyethylene (HDPE)\",\"color\":\"Assorted\",\"offers\":{\"@type\":\"Offer\",\"priceCurrency\":\"USD\",\"price\":\"124.13\",\"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\":\"What tube sizes do these caps fit?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"These caps are designed for Caplugs® Evergreen 20 mL screw-neck vials and 30 mL centrifuge tubes. They use a larger thread than the 300-3010 and 300-3022 cap families and are not interchangeable with those sizes, so confirm your tube's thread specification before ordering.\"}},{\"@type\":\"Question\",\"name\":\"Can these caps be autoclaved or used for frozen storage?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes — the HDPE material is compatible with autoclave sterilization at 121 °C \/ 15 psi and with cryogenic storage down to –80 °C. All caps in the assorted bag share the same material and performance ratings as the single-color 300-3532 variants.\"}},{\"@type\":\"Question\",\"name\":\"What colors are included in the assorted bag, and will they always be the same?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The bag contains a mix of colors drawn from the 300-3532 range. The specific color distribution may vary between bags — the assorted format is intended for trialing color routing assignments rather than for protocols that require a fixed set of colors. Once you have identified the colors that fit your workflow, single-color bulk orders are available.\"}},{\"@type\":\"Question\",\"name\":\"Are these caps sterile?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No — they are supplied non-sterile. Laboratories requiring sterile closures should autoclave the caps using the 121 °C \/ 15 psi cycle prior to use.\"}}]}\u003c\/script\u003e","brand":"Caplugs® Evergreen","offers":[{"title":"Default Title","offer_id":48567914627304,"sku":"300-3532-X20","price":124.13,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0694\/5361\/1240\/files\/Assorted_2020_2030_20mL_20Caps.png?v=1779073820","url":"https:\/\/labsupplies.com\/products\/caplugs-300-3532-x20-hdpe-screw-cap-20ml-vial-30ml-centrifuge-tube-assorted","provider":"LabSupplies.com","version":"1.0","type":"link"}