{"product_id":"caplugs-300-3531-u20-slidefix-pap-jar-screw-caps-hdpe-purple","title":"Caps, Screw Caps, HDPE, Purple — 300-3531-U20 | 1000\/Bag | Caplugs® Evergreen","description":"\u003ch2\u003eSlide-Fix™ PAP Jar Screw Caps, HDPE, Purple — 300-3531-U20 | 1000\/Bag\u003c\/h2\u003e \u003ctable\u003e \u003cthead\u003e\u003ctr\u003e\u003cth colspan=\"2\"\u003eQuick Reference — 300-3531-U20\u003c\/th\u003e\u003c\/tr\u003e\u003c\/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eSub-brand\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eSlide-Fix™ (Caplugs® Evergreen)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eJar Compat.\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eSlide-Fix™ PAP smear fixative jars\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eHigh-Density Polyethylene (HDPE)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eColor\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003ePurple\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eColor Use\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003ePurple Slide-Fix™ caps provide an additional color dimension for \u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eFixative\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e✓ Alcohol and Carbowax\/PEG compatible\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eAutoclave\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e✓ Compatible (121°C)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003ePack Size\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e1000 \/ Bag\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003ePrice\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e$106.17 \/ Bag ($0.1062 \/ cap)\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e \u003ch2\u003eTechnical Narrative\u003c\/h2\u003e \u003cp\u003eThe Caplugs® Evergreen Slide-Fix™ is a purple HDPE screw cap for Slide-Fix™ PAP smear fixative jars. Purple Slide-Fix™ caps provide an additional color dimension for cytology batch routing systems where the more common colors (Orange, Fuchsia, Red, Green) are already assigned — purple is used to designate specialized cytology sub-types, overflow accession batches, or specific anatomic site designations within multi-category cytology batch routing schemes. With this addition, the Slide-Fix™ cap range now spans nine colors, providing the full color vocabulary needed for complex cytology batch routing protocols in high-volume anatomic pathology and cytology laboratories.\u003c\/p\u003e \u003cp\u003eHDPE provides the chemical resistance required for prolonged contact with alcohol-based and Carbowax\/PEG cytology fixatives, autoclave compatibility at 121°C for pre-sterilized supply, and consistent screw-thread engagement for leak-free fixative jar closure. All nine Slide-Fix™ colors share the identical HDPE material specification and thread geometry — color is the only variable.\u003c\/p\u003e \u003cp\u003eAt $106.17 per 1000\/Bag — $0.1062 per cap. See the complete 9-color table above. All colors priced identically at $106.17\/1000.\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\u003e3003531U20E1\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eSub-brand\u003c\/td\u003e \u003ctd\u003eSlide-Fix™ (Caplugs® Evergreen)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eCap Style\u003c\/td\u003e \u003ctd\u003eScrew cap — PAP jar thread\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eMaterial\u003c\/td\u003e \u003ctd\u003eHigh-Density Polyethylene (HDPE)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eColor\u003c\/td\u003e \u003ctd\u003ePurple\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eJar Compat.\u003c\/td\u003e \u003ctd\u003eSlide-Fix™ PAP smear fixative jars\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eFixative\u003c\/td\u003e \u003ctd\u003e✓ Alcohol (EtOH, IPA) and Carbowax\/PEG fixatives\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eAutoclave\u003c\/td\u003e \u003ctd\u003e✓ 121°C \/ 15 psi\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\u003e1000 \/ Bag\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\u003eSlide-Fix™ PAP Jar Cap Workflow Compatibility — Purple\u003c\/h2\u003e \u003cp\u003eThe purple HDPE cap provides cytology fixative jar closure:\u003c\/p\u003e \u003ctable\u003e \u003cthead\u003e\u003ctr\u003e \u003cth\u003eApplication\u003c\/th\u003e \u003cth\u003eTube \/ Specimen\u003c\/th\u003e \u003cth\u003eNotes\u003c\/th\u003e \u003c\/tr\u003e\u003c\/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd\u003eSlide-Fix™ PAP jar capping\u003c\/td\u003e \u003ctd\u003eSlide-Fix™ PAP smear fixative jars\u003c\/td\u003e \u003ctd\u003eHDPE threads engage Slide-Fix™ jar neck thread\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eGYN cytology fixation\u003c\/td\u003e \u003ctd\u003eCervical, endocervical, vaginal smear fixation\u003c\/td\u003e \u003ctd\u003eHDPE resists alcohol and Carbowax fixatives\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eColor-coded cytology batching\u003c\/td\u003e \u003ctd\u003eVisual batch differentiation in cytology lab\u003c\/td\u003e \u003ctd\u003e9 colors for complete cytology batch routing protocol\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eSpecialized batch routing\u003c\/td\u003e \u003ctd\u003eSub-type or overflow batch designation\u003c\/td\u003e \u003ctd\u003ePurple\/Yellow expand routing beyond 7-color schemes\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eNon-GYN cytology\u003c\/td\u003e \u003ctd\u003eBAL, sputum, body fluid smear fixation\u003c\/td\u003e \u003ctd\u003eColor routing for non-GYN vs GYN specimen separation\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eReplacement cap program\u003c\/td\u003e \u003ctd\u003eLost\/damaged caps for Slide-Fix™ jars\u003c\/td\u003e \u003ctd\u003eExact thread for Slide-Fix™ jar necks\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eCytology QC compliance\u003c\/td\u003e \u003ctd\u003eCAP\/CLIA accredited cytology lab closure\u003c\/td\u003e \u003ctd\u003eHDPE cap per pre-analytical cytology protocol\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e \u003cp\u003e\u003cem\u003eValidate cap-to-jar thread fit with a sample before bulk purchase.\u003c\/em\u003e\u003c\/p\u003e \u003ch2\u003eChemical Resistance — High-Density Polyethylene (HDPE)\u003c\/h2\u003e \u003cp\u003eHDPE resists alcohol and Carbowax\/PEG cytology fixatives. Autoclave-compatible.\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\u003eAlcohol fixatives (EtOH, IPA)\u003c\/td\u003e \u003ctd\u003e✓ Excellent — primary cytology fixative\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eCarbowax \/ PEG fixatives\u003c\/td\u003e \u003ctd\u003e✓ Good — standard Slide-Fix™ formulation\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eAqueous buffers\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\u003eAutoclave (121°C)\u003c\/td\u003e \u003ctd\u003e✓ Compatible\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eConcentrated organics\u003c\/td\u003e \u003ctd\u003e✗ Not recommended at high concentration\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e \u003ch2\u003eComplete Slide-Fix™ PAP Jar Cap Color Range (9 Colors)\u003c\/h2\u003e \u003cp\u003eAll nine colors are identical HDPE thread specification — color selection is cytology protocol-driven:\u003c\/p\u003e \u003ctable\u003e \u003cthead\u003e\u003ctr\u003e \u003cth\u003ePart Number\u003c\/th\u003e \u003cth\u003eColor\u003c\/th\u003e \u003cth\u003ePrice\/1000\u003c\/th\u003e \u003cth\u003ePrimary Use\u003c\/th\u003e \u003c\/tr\u003e\u003c\/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd\u003e300-3531-020\u003c\/td\u003e \u003ctd\u003eNatural\u003c\/td\u003e \u003ctd\u003e$106.17\u003c\/td\u003e \u003ctd\u003eDefault \/ label-based ID\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e300-3531-B20\u003c\/td\u003e \u003ctd\u003eBlue\u003c\/td\u003e \u003ctd\u003e$106.17\u003c\/td\u003e \u003ctd\u003eGYN cytology batch routing\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e300-3531-E20\u003c\/td\u003e \u003ctd\u003eOrange\u003c\/td\u003e \u003ctd\u003e$106.17\u003c\/td\u003e \u003ctd\u003eSTAT \/ priority cytology\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e300-3531-G20\u003c\/td\u003e \u003ctd\u003eGreen\u003c\/td\u003e \u003ctd\u003e$106.17\u003c\/td\u003e \u003ctd\u003eNon-GYN \/ processing round\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e300-3531-K20\u003c\/td\u003e \u003ctd\u003eFuchsia\u003c\/td\u003e \u003ctd\u003e$106.17\u003c\/td\u003e \u003ctd\u003eGYN \/ anatomic pathology\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e300-3531-L20\u003c\/td\u003e \u003ctd\u003eLavender\u003c\/td\u003e \u003ctd\u003e$106.17\u003c\/td\u003e \u003ctd\u003eDate-coded \/ EDTA batch routing\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e300-3531-R20\u003c\/td\u003e \u003ctd\u003eRed\u003c\/td\u003e \u003ctd\u003e$106.17\u003c\/td\u003e \u003ctd\u003eSecond-read \/ QC review\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e\u003cstrong\u003ePurple\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e$106.17\u003c\/td\u003e \u003ctd\u003eSpecialized cytology batch designation\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e300-3531-Y20\u003c\/td\u003e \u003ctd\u003eYellow\u003c\/td\u003e \u003ctd\u003e$106.17\u003c\/td\u003e \u003ctd\u003eSPS\/culture \/ specialized tube batches\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e \u003ch2\u003eLaboratory Applications\u003c\/h2\u003e \u003cp\u003eServes cytology labs using Slide-Fix™ jars for color-coded batch routing, GYN and non-GYN cytology fixation, and any cytology program requiring additional color variety beyond the primary seven-color range.\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. We supply reference laboratories, hospital systems, and federal procurement offices under institutional pricing programs with blanket-order support and same-day shipping. \u003ca href=\"#request-sample\"\u003eRequest a free sample below\u003c\/a\u003e to validate fit before committing to volume.\u003c\/p\u003e \u003ch2\u003eFrequently Asked Questions — Caplugs® Evergreen \u003c\/h2\u003e \u003ch3\u003eWhat cytology workflow uses purple Slide-Fix™ caps?\u003c\/h3\u003e \u003cp\u003ePurple Slide-Fix™ caps provide an additional color dimension for cytology batch routing systems where the more common colors (Orange, Fuchsia, Red, Green) are already assigned — purple is used to designate specialized cytology sub-types, overflow accession batches, or specific anatomic site designations within multi-category cytology batch routing schemes. All nine colors are identical HDPE specification — color is protocol-defined.\u003c\/p\u003e \u003ch3\u003eHow many colors are available in the Slide-Fix™ PAP jar cap range?\u003c\/h3\u003e \u003cp\u003eNine colors: Natural, Blue, Orange, Green, Fuchsia, Lavender, Red, Purple, and Yellow — all at $106.17\/1000, all identical HDPE thread specification. See the complete table above for all part numbers and their primary cytology conventions.\u003c\/p\u003e \u003ch3\u003eAre all nine Slide-Fix™ cap colors the same price?\u003c\/h3\u003e \u003cp\u003eYes. All nine colors are priced identically at $106.17\/1000. Choose colors based entirely on your cytology lab's batch routing protocol requirements.\u003c\/p\u003e \u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"Product\",\n  \"name\": \"Slide-Fix\\u2122 PAP Jar Screw Caps, Non-Sterile, High-Density Polyethylene (HDPE), Purple \\u2014 300-3531-U20 | 1000\/Bag | Caplugs\\u00ae Evergreen\",\n  \"description\": \"Caplugs\\u00ae Evergreen 300-3531-U20. Slide-Fix\\u2122 PAP jar HDPE screw caps, purple, 1000\/Bag. Cytology fixative jar closure. BPA-free. USA.\",\n  \"sku\": \"3003531U20E1\",\n  \"mpn\": \"300-3531-U20\",\n  \"material\": \"High-Density Polyethylene (HDPE)\",\n  \"color\": \"Purple\",\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\": \"106.17\",\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\": \"1000 \/ 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\": \"Sub-brand\",\n      \"value\": \"Slide-Fix\\u2122\"\n    },\n    {\n      \"@type\": \"PropertyValue\",\n      \"name\": \"Jar Compatibility\",\n      \"value\": \"Slide-Fix\\u2122 PAP jar\"\n    },\n    {\n      \"@type\": \"PropertyValue\",\n      \"name\": \"Fixative Compatibility\",\n      \"value\": \"Alcohol and Carbowax\/PEG\"\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 cytology workflow uses purple Slide-Fix\\u2122 caps?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Purple Slide-Fix\\u2122 caps provide an additional color dimension for cytology batch routing systems where the more common colors (Orange, Fuchsia, Red, Green) are already assigned \\u2014 purple is used to designate specialized cytology sub-types, overflow accession batches, or specific anatomic site designations within multi-category cytology batch routing schemes. All nine colors are identical HDPE specification \\u2014 color is protocol-defined.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How many colors are available in the Slide-Fix\\u2122 PAP jar cap range?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Nine colors: Natural, Blue, Orange, Green, Fuchsia, Lavender, Red, Purple, and Yellow \\u2014 all at $106.17\/1000, all identical HDPE thread specification. See the complete table above for all part numbers and their primary cytology conventions.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Are all nine Slide-Fix\\u2122 cap colors the same price?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. All nine colors are priced identically at $106.17\/1000. Choose colors based entirely on your cytology lab's batch routing protocol requirements.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"Caplugs® Evergreen","offers":[{"title":"Default Title","offer_id":48567883890920,"sku":"300-3531-U20","price":106.17,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0694\/5361\/1240\/files\/300-3532-U20_01.jpg?v=1779073264","url":"https:\/\/labsupplies.com\/products\/caplugs-300-3531-u20-slidefix-pap-jar-screw-caps-hdpe-purple","provider":"LabSupplies.com","version":"1.0","type":"link"}