{"product_id":"globe-scientific-tuffblok-tube-rack","title":"Globe Scientific TUFFBLOK Tube Rack - Link-Together 4-Way, PP, PACK\/5, 7 Colors","description":"\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eMost tube racks have a fixed footprint and tube capacity — you get what the mold provides and nothing more. The Globe Scientific TUFFBLOK is built differently: each individual 4-way PP rack unit interlocks physically with adjacent TUFFBLOK units to create a continuous, custom-sized rack array that expands in any direction across the bench. A single TUFFBLOK can be used standalone for small batch sets, or linked together into a 2×2, 3×4, or larger grid for high-throughput batch processing — all without tools, adapters, or additional hardware.\u003c\/p\u003e\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eAvailable in Standard (456940, 4-way, PACK\/5 at $73.10) and XL (456945, 4-way, PACK\/5 at $148.30) sizes, in 7 colors — Blue, Natural, Green, Orange, Pink, Yellow, plus Assorted packs. Standard is designed for smaller-diameter tubes; XL accommodates larger tubes in the same link-together format. Both are autoclavable PP construction with heavy-duty chemical resistance.\u003c\/p\u003e\u003ch2 class=\"mb-2 mt-4 font-display font-semimedium text-base first:mt-0 md:text-lg [hr+\u0026amp;]:mt-4\"\u003eFeatures and Benefits\u003c\/h2\u003e\u003cul class=\"marker:text-quiet list-disc\"\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003e\u003cstrong\u003e4-Way Link-Together System:\u003c\/strong\u003e Each TUFFBLOK unit connects to adjacent units on all four sides, allowing any rectangular array size to be built up from individual units — expand the rack by adding units in any direction as batch size grows, or pull units off to downsize between runs without wasted rack space.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003e\u003cstrong\u003eStandard and XL Sizes:\u003c\/strong\u003e Standard units for smaller-diameter tubes; XL units for larger tube diameters in the same modular link-together format. Both PACK\/5 — a 5-pack provides immediate flexibility to build a 5-unit array or divide units across multiple workstations.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003e\u003cstrong\u003eHeavy-Duty PP Construction:\u003c\/strong\u003e Thick-wall reinforced polypropylene provides substantially more rigidity than standard rack PP — the TUFFBLOK holds its shape under heavy tube loads and does not deform or warp in autoclave cycles, maintaining dimensional integrity for reliable tube retention across repeated use.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003e\u003cstrong\u003e7 Colors Including Assorted:\u003c\/strong\u003e Blue, Natural, Green, Orange, Pink, Yellow, plus Assorted 5-packs — the assorted pack provides immediate color variety for establishing color-coded systems across multiple TUFFBLOK arrays by assay, priority, day, or group.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003e\u003cstrong\u003eAutoclavable for Sterile Workflows:\u003c\/strong\u003e Both Standard and XL versions are autoclavable at 121°C — appropriate for tissue culture, sterile sample processing, and any workflow requiring equipment sterilization between experimental runs.\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2 class=\"mb-2 mt-4 font-display font-semimedium text-base first:mt-0 md:text-lg [hr+\u0026amp;]:mt-4\"\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eProperty\u003c\/th\u003e\n\u003cth\u003eStandard (456940)\u003c\/th\u003e\n\u003cth\u003eXL (456945)\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePack Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePACK\/5\u003c\/td\u003e\n\u003ctd\u003ePACK\/5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePrice (PACK\/5)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e$73.10\u003c\/td\u003e\n\u003ctd\u003e$148.30\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003eReinforced Polypropylene (PP)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLink System\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e4-Way — connects to adjacent TUFFBLOK units on all four sides\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAutoclavable\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eColors\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003eBlue · Natural · Green · Orange · Pink · Yellow · Assorted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003eIndia\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2 class=\"mb-2 mt-4 font-display font-semimedium text-base first:mt-0 md:text-lg [hr+\u0026amp;]:mt-4\"\u003eLaboratory Applications\u003c\/h2\u003e\u003cul class=\"marker:text-quiet list-disc\"\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eHigh-throughput labs where batch size varies between runs — link TUFFBLOK units together into an array sized to the current batch, then detach and redistribute units for the next run without maintaining fixed-size racks for every possible batch volume\u003c\/p\u003e\u003c\/li\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eBench organization systems requiring durable, long-service racks that survive daily heavy use, chemical exposure, and repeated autoclave cycles without warping or losing tube-retention geometry — heavy-duty PP construction exceeds standard rack durability\u003c\/p\u003e\u003c\/li\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eColor-coded multi-assay workflows using mixed-color TUFFBLOK arrays where differently colored units within a linked array differentiate specimen sub-groups, control positions, or priority tiers within a single large batch without physical separation between groups\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2 class=\"mb-2 mt-4 font-display font-semimedium text-base first:mt-0 md:text-lg [hr+\u0026amp;]:mt-4\"\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003e\u003cstrong\u003eHow many tubes does each TUFFBLOK unit hold?\u003c\/strong\u003e\u003cbr\u003eGlobe Scientific's documentation specifies tube counts per unit — verify the tube capacity per individual TUFFBLOK unit for your tube diameter from Globe Scientific's product specifications. A PACK\/5 provides 5 individual units; each can be used standalone or linked together.\u003c\/p\u003e\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003e\u003cstrong\u003eStandard vs XL — how do I choose?\u003c\/strong\u003e\u003cbr\u003eStandard (456940) is designed for smaller-diameter tubes (test tubes, most centrifuge tubes); XL (456945) accommodates larger tube diameters. Check your most common tube OD against Globe Scientific's dimensional specifications for each size. Both use the same 4-way link system and are available in the same 7 colors.\u003c\/p\u003e\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003e\u003cstrong\u003eCan Standard and XL units be linked together?\u003c\/strong\u003e\u003cbr\u003eThe Standard and XL TUFFBLOK units use the same 4-way link system; however, mixing sizes in a linked array may create dimensional mismatches at the linkage points. For the most stable linked arrays, use units from the same size family (all Standard or all XL).\u003c\/p\u003e\u003ch2 class=\"mb-2 mt-4 font-display font-semimedium text-base first:mt-0 md:text-lg [hr+\u0026amp;]:mt-4\"\u003eQuality Assurance\u003c\/h2\u003e\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eGlobe Scientific products are manufactured under strict ISO 9001:2015 certified quality systems. Designed to meet the demanding requirements of clinical and research laboratories, these products undergo rigorous inspection to ensure consistent performance and reliability.\u003c\/p\u003e\u003ch2 class=\"mb-2 mt-4 font-display font-semimedium text-base first:mt-0 md:text-lg [hr+\u0026amp;]:mt-4\"\u003eAcademic and Institutional Pricing\u003c\/h2\u003e\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eLabSupplies.com offers tiered quantity pricing for academic and research institutions. As an authorized dealer, we ship directly from USA inventory.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"How many tubes does each TUFFBLOK unit hold?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Globe Scientific's documentation specifies tube counts per unit \\u2014 verify the tube capacity per individual TUFFBLOK unit for your tube diameter from Globe Scientific's product specifications. A PACK\/5 provides 5 individual units; each can be used standalone or linked together.\"}}, {\"@type\": \"Question\", \"name\": \"Standard vs XL \\u2014 how do I choose?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Standard (456940) is designed for smaller-diameter tubes (test tubes, most centrifuge tubes); XL (456945) accommodates larger tube diameters. Check your most common tube OD against Globe Scientific's dimensional specifications for each size. Both use the same 4-way link system and are available in the same 7 colors.\"}}, {\"@type\": \"Question\", \"name\": \"Can Standard and XL units be linked together?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The Standard and XL TUFFBLOK units use the same 4-way link system; however, mixing sizes in a linked array may create dimensional mismatches at the linkage points. For the most stable linked arrays, use units from the same size family (all Standard or all XL).\"}}]}\n\u003c\/script\u003e","brand":"Globe Scientific","offers":[{"title":"Standard \/ Assorted","offer_id":48072009416936,"sku":"456940AST","price":73.1,"currency_code":"USD","in_stock":true},{"title":"Standard \/ Blue","offer_id":48072009449704,"sku":"456940B","price":73.1,"currency_code":"USD","in_stock":true},{"title":"Standard \/ Natural","offer_id":48072009482472,"sku":"456940C","price":73.1,"currency_code":"USD","in_stock":true},{"title":"Standard \/ Green","offer_id":48072009515240,"sku":"456940G","price":73.1,"currency_code":"USD","in_stock":true},{"title":"Standard \/ Orange","offer_id":48072009548008,"sku":"456940N","price":73.1,"currency_code":"USD","in_stock":true},{"title":"Standard \/ Pink","offer_id":48072009580776,"sku":"456940P","price":73.1,"currency_code":"USD","in_stock":true},{"title":"Standard \/ Yellow","offer_id":48072009613544,"sku":"456940Y","price":73.1,"currency_code":"USD","in_stock":true},{"title":"XL \/ Assorted","offer_id":48072009646312,"sku":"456945AST","price":148.3,"currency_code":"USD","in_stock":true},{"title":"XL \/ Blue","offer_id":48072009679080,"sku":"456945B","price":148.3,"currency_code":"USD","in_stock":true},{"title":"XL \/ Natural","offer_id":48072009711848,"sku":"456945C","price":148.3,"currency_code":"USD","in_stock":true},{"title":"XL \/ Green","offer_id":48072009744616,"sku":"456945G","price":148.3,"currency_code":"USD","in_stock":true},{"title":"XL \/ Orange","offer_id":48072009777384,"sku":"456945N","price":148.3,"currency_code":"USD","in_stock":true},{"title":"XL \/ Pink","offer_id":48072009810152,"sku":"456945P","price":148.3,"currency_code":"USD","in_stock":true},{"title":"XL \/ Yellow","offer_id":48072009842920,"sku":"456945Y","price":148.3,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0694\/5361\/1240\/files\/file_39a61e61-eba9-41f7-b1ad-06317901ffad.jpg?v=1771615392","url":"https:\/\/labsupplies.com\/products\/globe-scientific-tuffblok-tube-rack","provider":"LabSupplies.com","version":"1.0","type":"link"}