{"product_id":"test-tube-racks-30mm-21-positions-blue-ppc-2403204b8sie1","title":"Tube Racks, PPC, Blue — 240-3204-B8SI | Caplugs® Evergreen","description":"\u003ch2\u003e21-Position Test Tube Rack for 30 mm Tubes — Polypropylene Copolymer, Blue (240-3204-B8SI)\u003c\/h2\u003e\n\u003cp\u003eThese blue polypropylene copolymer test tube racks hold 21 tubes at 30 mm diameter, providing high-density, color-coded organization for clinical, research, and industrial laboratory workstations. Supplied as individual, unassembled units, they arrive in a compact format that simplifies storage and shipping, then assemble quickly for immediate bench use. Part number 240-3204-B8SI is a non-sterile, reusable rack designed for demanding laboratory environments where chemical resistance and impact durability are essential.\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\u003e240-3204-B8SI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eTest Tube Rack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Size (Diameter)\u003c\/td\u003e\n\u003ctd\u003e30 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Positions\u003c\/td\u003e\n\u003ctd\u003e21\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003ePolypropylene Copolymer (PPC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColor\u003c\/td\u003e\n\u003ctd\u003eBlue\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\u003eFormat\u003c\/td\u003e\n\u003ctd\u003eIndividual, Unassembled\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePack Size\u003c\/td\u003e\n\u003ctd\u003e1 rack\/unit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBPA \/ Phthalate Free\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLot Numbered\u003c\/td\u003e\n\u003ctd\u003eYes\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\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eClinical chemistry: organizing 30 mm tubes during sample processing, dilution, and analysis workflows\u003c\/li\u003e\n\u003cli\u003eHematology and microbiology: stable tube holding during incubation and specimen batching\u003c\/li\u003e\n\u003cli\u003eBlood bank and serology: color-coded rack organization by specimen category or assay type\u003c\/li\u003e\n\u003cli\u003eResearch laboratories: culture tube management and multi-rack workstation setups\u003c\/li\u003e\n\u003cli\u003eIndustrial quality control: specimen and sample staging in regulated testing environments\u003c\/li\u003e\n\u003cli\u003eCAP \/ CLIA \/ ISO 15189 environments: lot-numbered racks support traceability documentation\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\u003eCommon laboratory disinfectants\u003c\/td\u003e\n\u003ctd\u003eGood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAlcohols (\u0026lt;70%)\u003c\/td\u003e\n\u003ctd\u003eGood — short-term contact\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAutoclave \/ steam sterilization\u003c\/td\u003e\n\u003ctd\u003eCompatible\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\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eQuality \u0026amp; Procurement\u003c\/h2\u003e\n\u003cp\u003eMade in USA, these Caplugs® Evergreen racks are molded from BPA-free, phthalate-free polypropylene copolymer resin under ISO 9001 quality management, with lot numbering on every unit to satisfy traceability requirements in CAP-, CLIA-, and ISO 15189-accredited laboratories. LabSupplies.com is an authorized dealer stocking 240-3204-B8SI in USA inventory, with same-business-day shipping available for stocking items and tiered pricing for institutional and high-volume purchasers.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWhat tube diameter do these racks accept?\u003c\/strong\u003e\u003cbr\u003eThese racks are designed for 30 mm diameter test tubes and culture tubes. Using tubes of a significantly different outer diameter may compromise stability, so verify your tube dimensions before ordering.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDo the racks require any tools to assemble?\u003c\/strong\u003e\u003cbr\u003eNo — they are supplied unassembled for compact shipping and storage and are designed to be assembled by hand for immediate use without tools.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan these racks be autoclaved between uses?\u003c\/strong\u003e\u003cbr\u003eYes. Polypropylene copolymer is autoclave-compatible, making these racks suitable for reusable applications where steam sterilization or chemical disinfection is part of the workflow.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhy are the racks blue?\u003c\/strong\u003e\u003cbr\u003eThe blue color supports color-coded organization in multi-rack laboratory workstations, allowing staff to distinguish rack sets by assay type, sample batch, specimen category, or department at a glance without relabeling.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\/\",\"@type\":\"Product\",\"name\":\"21-Position Test Tube Rack for 30 mm Tubes, Polypropylene Copolymer, Blue — Caplugs® Evergreen 240-3204-B8SI\",\"sku\":\"2403204B8SIE1\",\"mpn\":\"240-3204-B8SI\",\"brand\":{\"@type\":\"Brand\",\"name\":\"Caplugs® Evergreen\"},\"material\":\"Polypropylene Copolymer (PPC)\",\"color\":\"Blue\",\"offers\":{\"@type\":\"Offer\",\"priceCurrency\":\"USD\",\"price\":\"15.79\",\"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 diameter do these racks accept?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"These racks are designed for 30 mm diameter test tubes and culture tubes. 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