{"product_id":"214-2088-g50-round-bottom-screw-cap-tube","title":"Round Bottom Test Tubes, 19 mL Polystyrene (PS), 16 x 125 mm, Green Screw Caps, Natural, 1000\/Bag | Caplugs® Evergreen","description":"\u003ch1\u003eCaplugs® Evergreen 19 mL Round Bottom Test Tubes, Polystyrene (PS), 16 x 125 mm, Green Screw Caps, Natural, 1000\/Bag\u003c\/h1\u003e\n\u003cp\u003eThe \u003cstrong\u003eCaplugs® Evergreen 19 mL Round Bottom Test Tubes\u003c\/strong\u003e deliver clear, rigid polystyrene tubes sized at 16 x 125 mm for sample collection, reagent aliquoting, and routine specimen handling. Each non-sterile tube ships unassembled with a green screw cap, giving labs flexible storage and a secure seal when ready for use.\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\u003e19 mL, 16 x 125 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\u003eClosure\/Cap\u003c\/td\u003e\n\u003ctd\u003eGreen Screw Cap (unassembled)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColor\u003c\/td\u003e\n\u003ctd\u003eNatural (tube)\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\u003eGeneral sample and specimen collection at the bench\u003c\/li\u003e\n\u003cli\u003eReagent and buffer aliquoting for routine assays\u003c\/li\u003e\n\u003cli\u003eShort-term storage of liquid and solid samples\u003c\/li\u003e\n\u003cli\u003eOptical inspection of samples through clear PS walls\u003c\/li\u003e\n\u003cli\u003eMixing and dilution preparation in clinical and research labs\u003c\/li\u003e\n\u003cli\u003eSample organization in standard 16 mm tube racks\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 bulk procurement.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eAre these tubes shipped with the caps attached?\u003c\/h3\u003e\n\u003cp\u003eNo. These tubes ship unassembled, meaning the green screw caps are packaged separately within the 1000\/Bag count so you can apply them as needed.\u003c\/p\u003e\n\u003ch3\u003eWhat is the tube material, and is it autoclavable?\u003c\/h3\u003e\n\u003cp\u003eThe tubes are molded from polystyrene (PS), a clear, rigid resin. PS is not autoclavable and should not be exposed to high-temperature sterilization; use them as non-sterile consumables.\u003c\/p\u003e\n\u003ch3\u003eWhat volume and dimensions do these tubes have?\u003c\/h3\u003e\n\u003cp\u003eEach tube holds 19 mL and measures 16 x 125 mm, fitting standard 16 mm tube racks and centrifuge adapters designed for that diameter.\u003c\/p\u003e\n\u003ch3\u003eAre these tubes sterile?\u003c\/h3\u003e\n\u003cp\u003eNo. These are non-sterile tubes intended for general laboratory sample handling, storage, and reagent preparation where sterility is not required.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"Product\",\n  \"name\": \"Caplugs® Evergreen 19 mL Round Bottom Test Tubes, Polystyrene (PS), 16 x 125 mm, Green Screw Caps, Natural, 1000\/Bag\",\n  \"sku\": \"214-2088-G50\",\n  \"brand\": {\n    \"@type\": \"Brand\",\n    \"name\": \"Caplugs® Evergreen\"\n  },\n  \"countryOfOrigin\": \"USA\",\n  \"offers\": {\n    \"@type\": \"Offer\",\n    \"priceCurrency\": \"USD\",\n    \"price\": \"209.15\",\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 tubes shipped with the caps attached?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"No. These tubes ship unassembled, meaning the green screw caps are packaged separately within the 1000\/Bag count so you can apply them as needed.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the tube material, and is it autoclavable?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The tubes are molded from polystyrene (PS), a clear, rigid resin. 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