{"product_id":"214-2030-010-round-bottom-test-tube","title":"Round Bottom Test Tubes, 8 mL Polystyrene, 13 x 100 mm, Natural, 1000\/Bag | Caplugs® Evergreen","description":"\u003ch1\u003eCaplugs® Evergreen 8 mL Round Bottom Test Tubes, Polystyrene, 13 x 100 mm, Natural, 1000\/Bag\u003c\/h1\u003e\n\u003cp\u003eThese \u003cstrong\u003e8 mL Round Bottom Test Tubes\u003c\/strong\u003e are molded from optically clear polystyrene with a 13 x 100 mm footprint that drops into standard tube racks, automated analyzers, and benchtop centrifuge adapters. Bench scientists rely on them for sample aliquoting, routine clinical chemistry, and general specimen handling where rimless round-bottom geometry aids pipette access and complete liquid recovery.\u003c\/p\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eRound Bottom Test Tubes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolume\/Size\u003c\/td\u003e\n\u003ctd\u003e8.0 mL, 13 x 100 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003ePolystyrene (PS)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColor\u003c\/td\u003e\n\u003ctd\u003eNatural (clear)\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\u003eCountry of Origin\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eRoutine clinical chemistry and serum sample handling\u003c\/li\u003e\n\u003cli\u003eHematology and immunoassay specimen transfer\u003c\/li\u003e\n\u003cli\u003eReagent dilution and aliquot preparation at the bench\u003c\/li\u003e\n\u003cli\u003eSample storage on standard 13 mm tube racks\u003c\/li\u003e\n\u003cli\u003eLoading into automated analyzers accepting 13 x 100 mm tubes\u003c\/li\u003e\n\u003cli\u003eGeneral-purpose mixing, decanting, and short-spin protocols\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eQuality \u0026amp; Procurement\u003c\/h2\u003e\n\u003cp\u003elabsupplies.com is an authorized Caplugs® Evergreen dealer shipping from US inventory, and these tubes are Made in USA. Each bag carries lot numbers to support traceability for CAP-, CLIA-, and ISO 15189-accredited laboratories. Institutional and grant-funded tiered pricing is available for high-volume and recurring purchase orders.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eAre these test tubes sterile?\u003c\/h3\u003e\n\u003cp\u003eNo. These tubes ship non-sterile and are intended for general laboratory and non-aseptic specimen handling. For sterile workflows, autoclaving polystyrene is not recommended due to its limited heat tolerance.\u003c\/p\u003e\n\u003ch3\u003eWhat rack and analyzer formats fit these tubes?\u003c\/h3\u003e\n\u003cp\u003eThe 13 x 100 mm dimension is a standard 13 mm round-bottom format compatible with common tube racks and many automated analyzer carriers that accept 13 x 100 mm tubes. Confirm your specific instrument's tube specification before loading.\u003c\/p\u003e\n\u003ch3\u003eCan these polystyrene tubes be centrifuged?\u003c\/h3\u003e\n\u003cp\u003eYes, for low to moderate g-forces typical of routine bench spins, provided tubes are properly supported in matched adapters. Polystyrene has lower mechanical strength than polypropylene, so avoid high-speed protocols.\u003c\/p\u003e\n\u003ch3\u003eDo the tubes come with caps?\u003c\/h3\u003e\n\u003cp\u003eThis listing is for the round-bottom tubes only; caps are not included. Compatible 13 mm closures are sold separately and can be added to your order through labsupplies.com.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\/\",\n  \"@type\": \"Product\",\n  \"name\": \"Caplugs® Evergreen 8 mL Round Bottom Test Tubes, Polystyrene, 13 x 100 mm, Natural, 1000\/Bag\",\n  \"sku\": \"214-2030-010\",\n  \"brand\": {\n    \"@type\": \"Brand\",\n    \"name\": \"Caplugs® Evergreen\"\n  },\n  \"countryOfOrigin\": \"USA\",\n  \"offers\": {\n    \"@type\": \"Offer\",\n    \"url\": \"https:\/\/labsupplies.com\/products\/214-2030-010\",\n    \"priceCurrency\": \"USD\",\n    \"price\": \"69.15\",\n    \"availability\": \"https:\/\/schema.org\/InStock\",\n    \"seller\": {\n      \"@type\": \"Organization\",\n      \"name\": \"labsupplies.com\"\n    }\n  }\n}\n\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\/\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Are these test tubes sterile?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"No. These tubes ship non-sterile and are intended for general laboratory and non-aseptic specimen handling. 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