{"product_id":"caplugs-258-4249-h90-biopsy-cassettes-acetal-1mm-holes-gray","title":"Biopsy Cassettes, PP, White — 258-4249-H90 | 500\/Bag | Caplugs® Evergreen","description":"\u003ch2\u003eBiopsy Cassettes with Covers, 1.0 mm Holes, Acetal (POM), Gray — 258-4249-H90 | 500\/Bag\u003c\/h2\u003e \u003ctable\u003e \u003cthead\u003e\u003ctr\u003e\u003cth colspan=\"2\"\u003eQuick Reference — 258-4249-H90\u003c\/th\u003e\u003c\/tr\u003e\u003c\/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eAcetal (POM)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eColor\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eGray\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eHole Size\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e1.0 mm (small fragment retention)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eCompartments\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e1 (standard single-specimen format)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eXylene Resist.\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e✓ Excellent — superior to PP\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eParaffin Compat.\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e✓ Excellent (56–65°C)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eAssembly\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eUnassembled — 500 cassettes + 500 covers per Bag\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eSterility\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eNon-Sterile\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003ePack Size\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e500 \/ Bag\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003ePrice\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e$140.54 \/ Bag ($0.2811 \/ cassette)\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e \u003ch2\u003eTechnical Narrative\u003c\/h2\u003e \u003cp\u003eThe Caplugs® Evergreen is a gray Acetal (POM) biopsy cassette with 1.0 mm holes for small tissue fragment retention during automated tissue processing. Gray acetal cassettes are commonly used for prosthetic valve, hard tissue, or decalcification specimens — workflows where a visually distinct neutral-tone cassette helps differentiate processing-intensive specimens from routine soft tissue batches. The 1.0 mm aperture retains needle cores, GI mucosal fragments, and other small specimens that would pass through standard 1.5–2.0 mm cassette holes during xylene clearing. Acetal's crystalline POM matrix delivers superior xylene resistance and dimensional stability versus PP, maintaining hole geometry through aggressive processing cycles.\u003c\/p\u003e \u003cp\u003eAcetal (POM) outperforms PP in prolonged xylene exposure, rapid cycle processor agitation, and sustained 65°C paraffin wax infiltration — making it the preferred cassette material for high-volume small biopsy programs where PP hole enlargement and dimensional creep increase fragment loss risk over time. The gray pigmentation is polymer-matrix compounded — not a surface coating — ensuring color permanence through the full processing solvent sequence.\u003c\/p\u003e \u003cp\u003eAt $140.54 per 500\/Bag — $0.2811 per cassette — the delivers acetal-grade fragment security in the gray color designation. Also available: 258-4247-W90 (Acetal White, $140.54\/Bag); 258-4248-G90 (Acetal Turquoise, $140.54\/Bag).\u003c\/p\u003e \u003ch2\u003eTechnical Specifications — Caplugs® Evergreen \u003c\/h2\u003e \u003ctable\u003e \u003cthead\u003e\u003ctr\u003e \u003cth\u003eSpecification\u003c\/th\u003e \u003cth\u003eValue\u003c\/th\u003e \u003c\/tr\u003e\u003c\/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd\u003ePart Number\u003c\/td\u003e \u003ctd\u003e\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eCaplugs Item #\u003c\/td\u003e \u003ctd\u003e2584249H90E1\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eMaterial\u003c\/td\u003e \u003ctd\u003eAcetal (POM) — Polyoxymethylene (POM)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eColor\u003c\/td\u003e \u003ctd\u003eGray\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eHole Size\u003c\/td\u003e \u003ctd\u003e1.0 mm\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eCompartments\u003c\/td\u003e \u003ctd\u003e1\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eXylene Resist.\u003c\/td\u003e \u003ctd\u003e✓ Excellent — POM superior to PP\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eParaffin Compat.\u003c\/td\u003e \u003ctd\u003e✓ Excellent — dimensional stability at 56–65°C\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eFormalin Compat.\u003c\/td\u003e \u003ctd\u003e✓ Excellent (10% NBF, extended exposure)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eAssembly State\u003c\/td\u003e \u003ctd\u003eUnassembled — 500 cassettes + 500 covers per Bag\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eSterility\u003c\/td\u003e \u003ctd\u003eNon-Sterile\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003ePack Size\u003c\/td\u003e \u003ctd\u003e500 \/ Bag\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eApplication\u003c\/td\u003e \u003ctd\u003eSmall biopsy, needle core, decalcification specimen processing\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eBPA \/ Phthalate\u003c\/td\u003e \u003ctd\u003eBPA-free; no phthalate plasticizers\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eCountry of Origin\u003c\/td\u003e \u003ctd\u003eMade in U.S.A. (California)\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e \u003ch2\u003eSmall Biopsy Processing Compatibility — \u003c\/h2\u003e \u003cp\u003eThe 1.0 mm hole format is the clinical standard for small tissue fragment retention:\u003c\/p\u003e \u003ctable\u003e \u003cthead\u003e\u003ctr\u003e \u003cth\u003eApplication\u003c\/th\u003e \u003cth\u003eSpecimen \/ Use\u003c\/th\u003e \u003cth\u003eNotes\u003c\/th\u003e \u003c\/tr\u003e\u003c\/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd\u003eNeedle core biopsy\u003c\/td\u003e \u003ctd\u003eProstate, liver, kidney, lung, thyroid\u003c\/td\u003e \u003ctd\u003e1.0 mm holes retain fragments after xylene dehydration\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eGI endoscopic biopsy\u003c\/td\u003e \u003ctd\u003eMucosal biopsy, esophageal, gastric\u003c\/td\u003e \u003ctd\u003eSmall aperture prevents fragment loss during clearing\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eCervical \/ endocervical\u003c\/td\u003e \u003ctd\u003eColposcopy, endocervical curetting\u003c\/td\u003e \u003ctd\u003eTissue dimensions post-fixation often below 1.5 mm\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eDecalcification specimens\u003c\/td\u003e \u003ctd\u003eBone biopsy, calcified tissue\u003c\/td\u003e \u003ctd\u003eAcetal resists formic acid and EDTA decal reagents\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eTiny shave \/ punch biopsy\u003c\/td\u003e \u003ctd\u003eSub-millimeter dermatology specimens\u003c\/td\u003e \u003ctd\u003e1.0 mm is minimum standard aperture for fragment retention\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e \u003cp\u003e\u003cem\u003eFor sub-millimeter fragments, pair with tissue biopsy foam pads as secondary containment inside the cassette.\u003c\/em\u003e\u003c\/p\u003e \u003ch2\u003eChemical \u0026amp; Processing Compatibility — Acetal (POM)\u003c\/h2\u003e \u003cp\u003eAcetal (POM) provides superior xylene and solvent resistance versus PP — the preferred material for demanding processing protocols.\u003c\/p\u003e \u003ctable\u003e \u003cthead\u003e\u003ctr\u003e \u003cth\u003eReagent \/ Condition\u003c\/th\u003e \u003cth\u003eCompatibility\u003c\/th\u003e \u003c\/tr\u003e\u003c\/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd\u003eFormalin (10% NBF, extended)\u003c\/td\u003e \u003ctd\u003e✓ Excellent\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eXylene \/ xylene substitutes\u003c\/td\u003e \u003ctd\u003e✓ Excellent — superior to PP\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eEthanol (all concentrations)\u003c\/td\u003e \u003ctd\u003e✓ Excellent\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eIsopropanol (IPA)\u003c\/td\u003e \u003ctd\u003e✓ Excellent\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eParaffin wax (56–65°C)\u003c\/td\u003e \u003ctd\u003e✓ Excellent — dimensional stability\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eFormic acid (decalcification)\u003c\/td\u003e \u003ctd\u003e✓ Good — 10–20% formic acid\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eEDTA (decalcification)\u003c\/td\u003e \u003ctd\u003e✓ Excellent\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eDilute acids (\u0026lt;10%)\u003c\/td\u003e \u003ctd\u003e✓ Good\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eAcetone (brief)\u003c\/td\u003e \u003ctd\u003e✓ Good\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e \u003ch2\u003eAnatomic Pathology Laboratory Applications\u003c\/h2\u003e \u003cp\u003eThe serves anatomic pathology programs processing prostate needle cores, GI endoscopic biopsies, cervical and endocervical biopsies, hepatic and renal needle biopsies, hard tissue and decalcification specimens, and any small tissue fragment protocol where 1.0 mm hole aperture is required for fragment retention.\u003c\/p\u003e \u003ch2\u003eU.S. Manufacturing, Quality \u0026amp; Institutional Procurement\u003c\/h2\u003e \u003cp\u003eEvery Caplugs® Evergreen lot is precision-molded at our California manufacturing facility and subject to rigorous dimensional inspection and material purity verification. We supply hospital systems, reference laboratories, and federal procurement offices under institutional pricing programs with blanket-order support and same-day shipping on stocked inventory. \u003ca href=\"#request-sample\"\u003eRequest a compatibility sample below\u003c\/a\u003e to validate fit with your protocol before committing to volume.\u003c\/p\u003e \u003ch2\u003eFrequently Asked Questions — Caplugs® Evergreen \u003c\/h2\u003e \u003ch3\u003eWhen should I choose gray cassettes over white or turquoise?\u003c\/h3\u003e \u003cp\u003eColor selection is protocol-driven. Gray acetal cassettes are commonly used for prosthetic valve, hard tissue, or decalcification specimens — workflows where a visually distinct neutral-tone cassette helps differentiate processing-intensive specimens from routine soft tissue batches. The choice between gray , white (258-4247-W90), and turquoise (258-4248-G90) does not affect cassette performance — all are identical Acetal (POM) with 1.0 mm holes. Select color based on your laboratory's color-coding protocol for specimen type or processing category designation.\u003c\/p\u003e \u003ch3\u003eWhy use Acetal (POM) for small biopsy cassettes?\u003c\/h3\u003e \u003cp\u003eAcetal's crystalline POM polymer structure provides superior xylene resistance and dimensional stability at 65°C versus PP — preventing the hole enlargement and dimensional creep that can increase fragment loss risk in PP cassettes over repeated processing cycles. The 1.0 mm aperture remains consistent across the cassette service life, ensuring reliable fragment retention for the small specimens that require this format.\u003c\/p\u003e \u003ch3\u003eIs the gray pigmentation stable through xylene and paraffin?\u003c\/h3\u003e \u003cp\u003eYes. The gray color is compounded into the Acetal (POM) matrix — not a surface coating — ensuring full color stability through formalin, ethanol, xylene, and paraffin wax without leaching or fading. Color permanence is critical for reliable specimen identification at the embedding station.\u003c\/p\u003e \u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"Product\",\n  \"name\": \"Biopsy Cassettes with Covers, 1.0 mm Holes, Non-Sterile, Acetal (POM), Gray \\u2014 258-4249-H90 | 500\/Bag Unassembled | Caplugs\\u00ae Evergreen\",\n  \"description\": \"Caplugs\\u00ae Evergreen 258-4249-H90. Acetal biopsy cassettes, 1.0 mm holes, gray, 500\/Bag. Small fragment retention. BPA-free. USA.\",\n  \"sku\": \"2584249H90E1\",\n  \"mpn\": \"258-4249-H90\",\n  \"material\": \"Acetal (POM)\",\n  \"color\": \"Gray\",\n  \"brand\": {\n    \"@type\": \"Brand\",\n    \"name\": \"Caplugs\\u00ae Evergreen\"\n  },\n  \"manufacturer\": {\n    \"@type\": \"Organization\",\n    \"name\": \"Caplugs\\u00ae Evergreen\",\n    \"address\": {\n      \"@type\": \"PostalAddress\",\n      \"addressCountry\": \"US\",\n      \"addressRegion\": \"CA\"\n    }\n  },\n  \"offers\": {\n    \"@type\": \"Offer\",\n    \"price\": \"140.54\",\n    \"priceCurrency\": \"USD\",\n    \"availability\": \"https:\/\/schema.org\/InStock\",\n    \"itemCondition\": \"https:\/\/schema.org\/NewCondition\",\n    \"seller\": {\n      \"@type\": \"Organization\",\n      \"name\": \"LabSupplies\"\n    }\n  },\n  \"additionalProperty\": [\n    {\n      \"@type\": \"PropertyValue\",\n      \"name\": \"Pack Size\",\n      \"value\": \"500 \/ Bag\"\n    },\n    {\n      \"@type\": \"PropertyValue\",\n      \"name\": \"Sterility\",\n      \"value\": \"Non-Sterile\"\n    },\n    {\n      \"@type\": \"PropertyValue\",\n      \"name\": \"Country of Origin\",\n      \"value\": \"United States\"\n    },\n    {\n      \"@type\": \"PropertyValue\",\n      \"name\": \"BPA Free\",\n      \"value\": \"Yes\"\n    },\n    {\n      \"@type\": \"PropertyValue\",\n      \"name\": \"Paraffin Compatible\",\n      \"value\": \"Yes\"\n    }\n  ]\n}\n\u003c\/script\u003e \u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"When should I choose gray cassettes over white or turquoise?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Color selection is protocol-driven. Gray acetal cassettes are commonly used for prosthetic valve, hard tissue, or decalcification specimens \\u2014 workflows where a visually distinct neutral-tone cassette helps differentiate processing-intensive specimens from routine soft tissue batches. The choice between gray (258-4249-H90), white (258-4247-W90), and turquoise (258-4248-G90) does not affect cassette performance \\u2014 all are identical Acetal (POM) with 1.0 mm holes. Select color based on your laboratory's color-coding protocol for specimen type or processing category designation.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Why use Acetal (POM) for small biopsy cassettes?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Acetal's crystalline POM polymer structure provides superior xylene resistance and dimensional stability at 65\\u00b0C versus PP \\u2014 preventing the hole enlargement and dimensional creep that can increase fragment loss risk in PP cassettes over repeated processing cycles. The 1.0 mm aperture remains consistent across the cassette service life, ensuring reliable fragment retention for the small specimens that require this format.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is the gray pigmentation stable through xylene and paraffin?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. The gray color is compounded into the Acetal (POM) matrix \\u2014 not a surface coating \\u2014 ensuring full color stability through formalin, ethanol, xylene, and paraffin wax without leaching or fading. Color permanence is critical for reliable specimen identification at the embedding station.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"Caplugs® Evergreen","offers":[{"title":"Default Title","offer_id":48564508360936,"sku":"258-4249-H90","price":140.54,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0694\/5361\/1240\/files\/258-4249-H90_02.jpg?v=1778941653","url":"https:\/\/labsupplies.com\/products\/caplugs-258-4249-h90-biopsy-cassettes-acetal-1mm-holes-gray","provider":"LabSupplies.com","version":"1.0","type":"link"}