{"product_id":"caplugs-300-3531-y20-slidefix-pap-jar-screw-caps-hdpe-yellow","title":"Caps, Screw Caps, HDPE, Yellow — 300-3531-Y20 | 1000\/Bag | Caplugs® Evergreen","description":"\u003ch2\u003eSlide-Fix™ PAP Jar Screw Caps, HDPE, Yellow — 300-3531-Y20 | 1000\/Bag\u003c\/h2\u003e \u003ctable\u003e \u003cthead\u003e\u003ctr\u003e\u003cth colspan=\"2\"\u003eQuick Reference — 300-3531-Y20\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\u003eYellow\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eColor Use\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eYellow Slide-Fix™ caps correspond to the SPS\/ACD blood culture an\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 yellow HDPE screw cap for Slide-Fix™ PAP smear fixative jars. Yellow Slide-Fix™ caps correspond to the SPS\/ACD blood culture and specialized tube convention — used in cytology labs to designate specialized fixative batches, culture-associated cytology specimens, or day-of-week coded accession batches in high-volume cytology processing workflows. 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\u003e3003531Y20E1\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\u003eYellow\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 — Yellow\u003c\/h2\u003e \u003cp\u003eThe yellow 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\u003e300-3531-U20\u003c\/td\u003e \u003ctd\u003ePurple\u003c\/td\u003e \u003ctd\u003e$106.17\u003c\/td\u003e \u003ctd\u003eSpecialized cytology batch designation\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e\u003cstrong\u003eYellow\u003c\/strong\u003e\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 yellow Slide-Fix™ caps?\u003c\/h3\u003e \u003cp\u003eYellow Slide-Fix™ caps correspond to the SPS\/ACD blood culture and specialized tube convention — used in cytology labs to designate specialized fixative batches, culture-associated cytology specimens, or day-of-week coded accession batches in high-volume cytology processing workflows. 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), Yellow \\u2014 300-3531-Y20 | 1000\/Bag | Caplugs\\u00ae Evergreen\",\n  \"description\": \"Caplugs\\u00ae Evergreen 300-3531-Y20. Slide-Fix\\u2122 PAP jar HDPE screw caps, yellow, 1000\/Bag. Cytology fixative jar closure. BPA-free. USA.\",\n  \"sku\": \"3003531Y20E1\",\n  \"mpn\": \"300-3531-Y20\",\n  \"material\": \"High-Density Polyethylene (HDPE)\",\n  \"color\": \"Yellow\",\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 yellow Slide-Fix\\u2122 caps?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yellow Slide-Fix\\u2122 caps correspond to the SPS\/ACD blood culture and specialized tube convention \\u2014 used in cytology labs to designate specialized fixative batches, culture-associated cytology specimens, or day-of-week coded accession batches in high-volume cytology processing workflows. 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. 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