{"product_id":"214-2009-010-round-bottom-test-tube","title":"Round Bottom Test Tubes, 3.4 mL, 12 x 50 mm, Polystyrene, Non-Sterile, Natural, 1000\/Bag | Caplugs® Evergreen","description":"\u003ch1\u003eCaplugs® Evergreen 3.4 mL Round Bottom Test Tubes, 12 x 50 mm, Polystyrene, Non-Sterile, Natural, 1000\/Bag\u003c\/h1\u003e\n\u003cp\u003eThese \u003cstrong\u003e3.4 mL round bottom test tubes\u003c\/strong\u003e are molded from clear polystyrene for high optical clarity, making them well suited to routine sample handling, colorimetric assays, and small-volume aliquoting at the bench. The 12 x 50 mm footprint fits standard small-tube racks and benchtop centrifuge adapters. Each natural, non-sterile tube ships in a bulk bag for high-throughput, cost-controlled lab workflows.\u003c\/p\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eProduct Type\u003c\/th\u003e\n\u003ctd\u003eRound Bottom Test Tubes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eVolume\/Size\u003c\/th\u003e\n\u003ctd\u003e3.4 mL, 12 x 50 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003ePolystyrene (PS)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eColor\u003c\/th\u003e\n\u003ctd\u003eNatural\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSterility\u003c\/th\u003e\n\u003ctd\u003eNon-Sterile\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePack Size\u003c\/th\u003e\n\u003ctd\u003e1000\/Bag\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCountry of Origin\u003c\/th\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 sample collection and small-volume aliquoting\u003c\/li\u003e\n\u003cli\u003eColorimetric and turbidimetric assays requiring clear-walled tubes\u003c\/li\u003e\n\u003cli\u003eReagent dispensing and short-term sample storage\u003c\/li\u003e\n\u003cli\u003eSerial dilutions in clinical and research labs\u003c\/li\u003e\n\u003cli\u003eReading optical density on small-tube photometers\u003c\/li\u003e\n\u003cli\u003eGeneral education and teaching-lab benchwork\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. Bags carry 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 standing orders — contact our team for a quote.\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 are non-sterile polystyrene tubes intended for general benchwork. If your protocol requires sterility, autoclaving is not recommended for polystyrene; select a sterile or autoclavable alternative instead.\u003c\/p\u003e\n\u003ch3\u003eWhat is the actual capacity and dimension of each tube?\u003c\/h3\u003e\n\u003cp\u003eEach tube has a nominal capacity of 3.4 mL and measures 12 x 50 mm. The round bottom suits low-speed spins and full liquid recovery during pipetting.\u003c\/p\u003e\n\u003ch3\u003eCan these polystyrene tubes be centrifuged?\u003c\/h3\u003e\n\u003cp\u003eThe 12 x 50 mm round bottom format fits common small-tube rotor adapters for low-speed clinical spins. Confirm your rotor's rated speed against polystyrene limits before use, as PS is less impact-resistant than polypropylene.\u003c\/p\u003e\n\u003ch3\u003eHow many tubes come in each pack?\u003c\/h3\u003e\n\u003cp\u003eEach bag contains 1000 tubes (1000\/Bag). Pricing shown is per bag, with tiered pricing available for institutional and grant-funded purchasing.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\/\",\n  \"@type\": \"Product\",\n  \"name\": \"Caplugs® Evergreen 3.4 mL Round Bottom Test Tubes, 12 x 50 mm, Polystyrene, Non-Sterile, Natural, 1000\/Bag\",\n  \"sku\": \"214-2009-010\",\n  \"brand\": {\n    \"@type\": \"Brand\",\n    \"name\": \"Caplugs® Evergreen\"\n  },\n  \"countryOfOrigin\": \"USA\",\n  \"offers\": {\n    \"@type\": \"Offer\",\n    \"url\": \"https:\/\/labsupplies.com\/products\/214-2009-010\",\n    \"priceCurrency\": \"USD\",\n    \"price\": \"50.67\",\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 are non-sterile polystyrene tubes intended for general benchwork. If your protocol requires sterility, autoclaving is not recommended for polystyrene; select a sterile or autoclavable alternative instead.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the actual capacity and dimension of each tube?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Each tube has a nominal capacity of 3.4 mL and measures 12 x 50 mm. The round bottom suits low-speed spins and full liquid recovery during pipetting.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can these polystyrene tubes be centrifuged?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The 12 x 50 mm round bottom format fits common small-tube rotor adapters for low-speed clinical spins. 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