{"product_id":"caplugs-258-4264-w90-4-compartment-biopsy-cassettes-acetal-06mm-white","title":"Biopsy Cassettes, PP, White — 258-4264-W90 | 500\/Bag | Caplugs® Evergreen","description":"\u003ch2\u003e4-Compartment Biopsy Cassettes with Covers, 0.6 mm Holes, Acetal (POM), White — 258-4264-W90 | 500\/Bag\u003c\/h2\u003e \u003ctable\u003e \u003cthead\u003e\u003ctr\u003e\u003cth colspan=\"2\"\u003eQuick Reference — 258-4264-W90\u003c\/th\u003e\u003c\/tr\u003e\u003c\/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eCompartments\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e4 isolated compartments\u003c\/td\u003e \u003c\/tr\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\u003eWhite\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eHole Size\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e0.6 mm per compartment\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003ePrimary Use\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eMulti-site biopsy panels, 4-quadrant gastric mapping, endoscopic biopsy sets\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eXylene Resist.\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e✓ Excellent\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$175.01 \/ Bag ($0.3501 \/ 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 4-compartment Acetal (POM) biopsy cassette with 0.6 mm holes per compartment — designed for multi-site biopsy panels, 4-quadrant gastric mapping, endoscopic biopsy sets where maintaining site-specific tissue identity through processing, embedding, and sectioning is a diagnostic requirement. The 4 integral compartment dividers are molded as part of the cassette body — not removable inserts — ensuring inter-compartment specimen isolation is maintained through the full processing solvent sequence including xylene and 65°C paraffin infiltration. The 0.6 mm aperture in each compartment retains the smallest clinically processed biopsy fragments while allowing full reagent penetration during tissue processing.\u003c\/p\u003e \u003cp\u003eAcetal (POM) is specified for this cassette class because the 0.6 mm hole size — smaller than the standard 1.0–2.0 mm range — requires maximum dimensional stability under xylene exposure and thermal cycling. At 0.6 mm, any polymer creep or hole deformation directly impacts specimen retention performance. Acetal's crystalline POM structure maintains 0.6 mm aperture geometry through prolonged xylene immersion, rapid-cycle processor agitation, and repeated paraffin infiltration at 65°C — a stability performance that PP cassettes cannot consistently deliver at sub-millimeter aperture sizes.\u003c\/p\u003e \u003cp\u003eAt $175.01 per 500\/Bag — $0.3501 per cassette — the 4-compartment format delivers site-specific biopsy preservation at a per-cassette cost that is competitive with processing 4 separate standard cassettes — with the added workflow benefit of reducing cassette count per patient case by up to 4x for 4-zone systematic prostate biopsy or gastric mapping protocols. Also available: 258-4252-W90 (2-Compartment Acetal White 0.6 mm, $168.90\/Bag); 258-4279-W90 (9-Compartment Acetal White 0.6 mm, $184.26\/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\u003e2584264W90E1\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eCompartments\u003c\/td\u003e \u003ctd\u003e4 isolated compartments — integral dividers\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\u003eWhite\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eHole Size\u003c\/td\u003e \u003ctd\u003e0.6 mm per compartment (ultra-small fragment retention)\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\u003eMulti-site biopsy panels, 4-quadrant gastric mapping, endoscopic biopsy sets\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\u003eMulti-Site Biopsy Protocol Compatibility — 4-Compartment \u003c\/h2\u003e \u003cp\u003eThe 4-compartment cassette is engineered for protocols requiring site-specific preservation of 4 discrete biopsy specimens in a single cassette through processing and embedding:\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\u003e4-quadrant gastric mapping\u003c\/td\u003e \u003ctd\u003e4-site gastric mucosal biopsy protocol\u003c\/td\u003e \u003ctd\u003eSydney Protocol gastric mapping standard — 4 defined sites\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eSystematic prostate biopsy\u003c\/td\u003e \u003ctd\u003e4-core prostate scheme per side (8-core total cassettes)\u003c\/td\u003e \u003ctd\u003eEach zone's core preserved in defined compartment\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e4-site colon mapping\u003c\/td\u003e \u003ctd\u003eRight colon, transverse, left colon, sigmoid\u003c\/td\u003e \u003ctd\u003eSite-specific compartment labeling for surveillance colonoscopy\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eCervical LLETZ 4-segment\u003c\/td\u003e \u003ctd\u003e4-segment LLETZ\/LEEP cervical specimen\u003c\/td\u003e \u003ctd\u003eAnatomic orientation preserved per compartment\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eMulti-punch dermatology\u003c\/td\u003e \u003ctd\u003e4 punch sites on single anatomic area\u003c\/td\u003e \u003ctd\u003eSingle cassette processing for dermatology punch series\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e \u003cp\u003e\u003cem\u003eCompartment dividers are integral to the Acetal cassette body — not removable inserts. Each compartment has its own 0.6 mm hole array for individual specimen retention. Label compartment positions on the cassette body before loading to maintain site-specific orientation through to the embedding stage.\u003c\/em\u003e\u003c\/p\u003e \u003ch2\u003eChemical \u0026amp; Processing Compatibility — Acetal (POM)\u003c\/h2\u003e \u003cp\u003eAcetal (POM) provides excellent xylene resistance and paraffin compatibility — essential for the 0.6 mm aperture to maintain dimension through repeated processing cycles.\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 4-compartment cassette serves anatomic pathology programs with high-volume systematic prostate biopsy; GI endoscopy pathology for multi-site mucosal mapping protocols including Sydney Protocol gastric mapping; gynecologic pathology for multi-quadrant cervical biopsy; dermatopathology for multi-punch biopsy protocols; and any histopathology workflow requiring site-specific preservation of 4 discrete specimens in a single processing cassette.\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\u003eWhat biopsy protocols are the 4-compartment cassette designed for?\u003c\/h3\u003e \u003cp\u003eThe 4-compartment format is designed for: Sydney Protocol 4-site gastric mapping (antrum, corpus, incisura, fundus), 4-quadrant colorectal surveillance biopsy, 4-zone prostate schemes, and LLETZ\/LEEP 4-segment cervical specimens. Each compartment maintains independent site identity through processing and embedding.\u003c\/p\u003e \u003ch3\u003eHow do the 0.6 mm holes in each compartment compare to standard cassettes?\u003c\/h3\u003e \u003cp\u003e0.6 mm is significantly smaller than the standard cassette hole range (1.0–2.0 mm), making the the appropriate choice for the smallest biopsy fragments — particularly GI mucosal fragments, endocervical curettings, and needle core specimens that shrink below 1.0 mm in cross-section during xylene dehydration. The Acetal (POM) material maintains this 0.6 mm aperture consistently across processing cycles — a stability requirement that rules out PP for this aperture size.\u003c\/p\u003e \u003ch3\u003eAre the compartment dividers removable in the cassette?\u003c\/h3\u003e \u003cp\u003eNo. The 4 compartment dividers are integral to the Acetal (POM) cassette body — molded as one piece. They cannot be removed. This is intentional — removable insert dividers can dislodge during tissue processor agitation, causing inter-compartment cross-contamination and specimen identification failure. The integral divider design maintains compartment isolation through the full processing sequence.\u003c\/p\u003e \u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"Product\",\n  \"name\": \"4-Compartment Biopsy Cassettes with Covers, 0.6 mm Holes, Non-Sterile, Acetal (POM), White \\u2014 258-4264-W90 | 500\/Bag Unassembled | Caplugs\\u00ae Evergreen\",\n  \"description\": \"Caplugs\\u00ae Evergreen 258-4264-W90. 4-compartment acetal biopsy cassettes, 0.6 mm holes, white, 500\/Bag. Multi-site biopsy. BPA-free. USA.\",\n  \"sku\": \"2584264W90E1\",\n  \"mpn\": \"258-4264-W90\",\n  \"material\": \"Acetal (POM)\",\n  \"color\": \"White\",\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\": \"175.01\",\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\": \"What biopsy protocols are the 4-compartment 258-4264-W90 cassette designed for?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The 258-4264-W90 4-compartment format is designed for: Sydney Protocol 4-site gastric mapping (antrum, corpus, incisura, fundus), 4-quadrant colorectal surveillance biopsy, 4-zone prostate schemes, and LLETZ\/LEEP 4-segment cervical specimens. Each compartment maintains independent site identity through processing and embedding.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How do the 0.6 mm holes in each compartment compare to standard cassettes?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"0.6 mm is significantly smaller than the standard cassette hole range (1.0\\u20132.0 mm), making the 258-4264-W90 the appropriate choice for the smallest biopsy fragments \\u2014 particularly GI mucosal fragments, endocervical curettings, and needle core specimens that shrink below 1.0 mm in cross-section during xylene dehydration. The Acetal (POM) material maintains this 0.6 mm aperture consistently across processing cycles \\u2014 a stability requirement that rules out PP for this aperture size.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Are the compartment dividers removable in the 258-4264-W90 cassette?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"No. The 4 compartment dividers are integral to the Acetal (POM) cassette body \\u2014 molded as one piece. They cannot be removed. This is intentional \\u2014 removable insert dividers can dislodge during tissue processor agitation, causing inter-compartment cross-contamination and specimen identification failure. The integral divider design maintains compartment isolation through the full processing sequence.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"Caplugs® Evergreen","offers":[{"title":"Default Title","offer_id":48564508459240,"sku":"258-4264-W90","price":175.01,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0694\/5361\/1240\/files\/258-4264-W90_02.jpg?v=1778941657","url":"https:\/\/labsupplies.com\/products\/caplugs-258-4264-w90-4-compartment-biopsy-cassettes-acetal-06mm-white","provider":"LabSupplies.com","version":"1.0","type":"link"}