{"product_id":"222-1590-02i-transfer-pipet-fine-tip","title":"20–25 µL Caps, Graduated, LDPE, Natural — 222-1590-02I | 400\/Bag | Caplugs® Evergreen","description":"\u003ch2\u003eQuick Reference\u003c\/h2\u003e \u003ctable\u003e \u003ctbody\u003e \u003ctr\u003e \u003cth\u003ePart Number\u003c\/th\u003e \u003ctd\u003e222-1590-02I\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003cth\u003eCapacity\u003c\/th\u003e \u003ctd\u003e3.5 mL\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003cth\u003eTip Type\u003c\/th\u003e \u003ctd\u003eFine Tip\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003cth\u003eTip Detail\u003c\/th\u003e \u003ctd\u003eelongated fine taper tip producing ~20 µL drops — approximately half the drop volume of standard transfer pipets\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003cth\u003eDrop Size\u003c\/th\u003e \u003ctd\u003e~20 µL\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003cth\u003eMaterial\u003c\/th\u003e \u003ctd\u003eLow-Density Polyethylene (LDPE)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003cth\u003eColor\u003c\/th\u003e \u003ctd\u003eNatural\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003cth\u003eSterility\u003c\/th\u003e \u003ctd\u003eSterile — individually sterile-packed\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003cth\u003ePack Size\u003c\/th\u003e \u003ctd\u003e400\/Bag\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003cth\u003eKey Use\u003c\/th\u003e \u003ctd\u003eprecision micro-volume dispensing where a 20 µL drop is required — lateral flow assay loading, immunochromatography, microtiter plate applications\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003cth\u003eOrigin\u003c\/th\u003e \u003ctd\u003eMade in USA\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003cth\u003ePrice\u003c\/th\u003e \u003ctd\u003e$77.00\/Bag ($0.1925\/pipet)\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e \u003ch2\u003eTechnical Narrative\u003c\/h2\u003e \u003cp\u003eThe Caplugs® Evergreen \u003cstrong\u003e222-1590-02I\u003c\/strong\u003e is a \u003cstrong\u003e3.5 mL Fine Tip Transfer Pipet\u003c\/strong\u003e, sterile, LDPE (Natural), 400\/Bag individually packed. The fine tip narrows to a long, tapered point producing ~20 µL drops — approximately half the drop volume of the standard 45 µL format. This smaller drop size is specified for lateral flow immunochromatography assay sample loading, point-of-care test well dispensing, microtiter plate seeding, and any protocol where a 20–25 µL application volume is the target and standard-tip pipets over-deliver per squeeze.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eLow-Density Polyethylene (LDPE)\u003c\/strong\u003e: the defining material for transfer pipets — LDPE's flexibility provides progressive, controllable bulb compression for smooth aspirate and dispense with one hand. LDPE's low extractable profile is suited for direct contact with serum, plasma, whole blood, and biological reagents. Sterile individually packed, no autoclaving required. BPA-free, phthalate-free, FDA-compliant, \u003c\/p\u003e \u003cp\u003eProcurement economics: \u003cstrong\u003e$77.00\/Bag\u003c\/strong\u003e, \u003cstrong\u003e$0.1925\/pipet\u003c\/strong\u003e. Full 222-15xx transfer pipet series: Standard (222-1577-02I, 45 µL, 500\/Bag); Graduated (222-1580-02I, 40 µL, 500\/Bag); Blood Bank (222-1585-02I, 40 µL, 500\/Bag); Fine Tip (, 20 µL, 400\/Bag); Long Stem (222-1595-02I, 40 µL, 400\/Bag). LabSupplies.com ships from USA inventory, typically same business day.\u003c\/p\u003e \u003ch2\u003eTechnical Specifications\u003c\/h2\u003e \u003ctable\u003e \u003ctbody\u003e \u003ctr\u003e \u003cth\u003ePart Number\u003c\/th\u003e \u003ctd\u003e\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003cth\u003eCaplugs Item #\u003c\/th\u003e \u003ctd\u003e\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003cth\u003eCapacity\u003c\/th\u003e \u003ctd\u003e3.5 mL\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003cth\u003eTip Type\u003c\/th\u003e \u003ctd\u003eFine Tip\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003cth\u003eTip Detail\u003c\/th\u003e \u003ctd\u003eelongated fine taper tip producing ~20 µL drops — approximately half the drop volume of standard transfer pipets\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003cth\u003eDrop Size\u003c\/th\u003e \u003ctd\u003e~20 µL per drop\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003cth\u003eMaterial\u003c\/th\u003e \u003ctd\u003eLow-Density Polyethylene (LDPE)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003cth\u003eColor\u003c\/th\u003e \u003ctd\u003eNatural\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003cth\u003eSterility\u003c\/th\u003e \u003ctd\u003eSterile — individually sterile-packed\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003cth\u003ePack Size\u003c\/th\u003e \u003ctd\u003e400\/Bag (3.5 mL fine tip transfer pipet, sterile, LDPE, 400\/Bag)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003cth\u003ePrimary Application\u003c\/th\u003e \u003ctd\u003eprecision micro-volume dispensing where a 20 µL drop is required — lateral flow assay loading, immunochromatography, microtiter plate applications\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003cth\u003eBPA \/ Phthalate\u003c\/th\u003e \u003ctd\u003eBPA-Free, Phthalate-Free, Latex-Free\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003cth\u003eCountry of Origin\u003c\/th\u003e \u003ctd\u003eUSA \u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003cth\u003ePrice\u003c\/th\u003e \u003ctd\u003e$77.00\/Bag ($0.1925\/pipet)\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e \u003ch2\u003e3.5 mL Fine Tip Transfer Pipet Applications\u003c\/h2\u003e \u003cp\u003eThe is suited to the following laboratory workflows where the fine tip tip geometry provides the key advantage.\u003c\/p\u003e \u003ctable\u003e \u003cthead\u003e\u003ctr\u003e \u003cth\u003eApplication\u003c\/th\u003e \u003cth\u003eSetting \/ Protocol\u003c\/th\u003e \u003cth\u003eNotes\u003c\/th\u003e \u003c\/tr\u003e\u003c\/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003cth\u003eLateral flow immunoassay\u003c\/th\u003e \u003ctd\u003eLFA sample pad loading (RDT\/POC)\u003c\/td\u003e \u003ctd\u003e~20 µL drop matches most POC LFA sample application volume\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003cth\u003eImmunochromatography\u003c\/th\u003e \u003ctd\u003eRapid diagnostic test well dispensing\u003c\/td\u003e \u003ctd\u003eFine tip for accurate well targeting on strip device\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003cth\u003eMicrotiter plate seeding\u003c\/th\u003e \u003ctd\u003eManual plate seeding, 96-well assays\u003c\/td\u003e \u003ctd\u003e20 µL drop size suits microtiter well volumes\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003cth\u003eUrinalysis strip reading\u003c\/th\u003e \u003ctd\u003eUrine drop onto reagent strip\u003c\/td\u003e \u003ctd\u003eFine tip for controlled small-volume application\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003cth\u003eMicro-volume dispensing\u003c\/th\u003e \u003ctd\u003ePrecise small-volume transfer\u003c\/td\u003e \u003ctd\u003eHalf the drop volume of standard tip — reduces over-dispensing\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003cth\u003eImmunofluorescence prep\u003c\/th\u003e \u003ctd\u003eAntigen spot application to slide\u003c\/td\u003e \u003ctd\u003eFine tip for targeted small-volume application\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003cth\u003eTeaching \/ pediatric lab\u003c\/th\u003e \u003ctd\u003eLow-volume sample collection and transfer\u003c\/td\u003e \u003ctd\u003eFine tip for small-volume specimen handling\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e \u003ch2\u003eChemical Resistance — Low-Density Polyethylene (LDPE)\u003c\/h2\u003e \u003cp\u003eCompatibility reference for LDPE at typical laboratory conditions.\u003c\/p\u003e \u003ctable\u003e \u003cthead\u003e\u003ctr\u003e \u003cth\u003eReagent \/ Condition\u003c\/th\u003e \u003cth\u003eCompatibility\u003c\/th\u003e \u003cth\u003eNotes\u003c\/th\u003e \u003c\/tr\u003e\u003c\/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd\u003eAqueous buffers \/ saline\u003c\/td\u003e \u003ctd\u003eExcellent\u003c\/td\u003e \u003ctd\u003eLDPE inert across pH 4–12; standard biological reagents.\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eSerum \/ plasma \/ whole blood\u003c\/td\u003e \u003ctd\u003eExcellent\u003c\/td\u003e \u003ctd\u003eStandard biological matrix; low extractables for direct blood contact.\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eEthanol (\u0026lt;70%)\u003c\/td\u003e \u003ctd\u003eGood\u003c\/td\u003e \u003ctd\u003eShort-term compatible for tissue dehydration steps.\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eMethanol (\u0026lt;50%)\u003c\/td\u003e \u003ctd\u003eGood\u003c\/td\u003e \u003ctd\u003eShort-term compatible.\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eAcetonitrile\u003c\/td\u003e \u003ctd\u003eLimited\u003c\/td\u003e \u003ctd\u003eAvoid prolonged LDPE contact; use LDPE for aqueous protocols.\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eDichloromethane \/ chloroform\u003c\/td\u003e \u003ctd\u003eNot Compatible\u003c\/td\u003e \u003ctd\u003eCauses swelling; do not use.\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eLISS \/ PEG enhancement media\u003c\/td\u003e \u003ctd\u003eExcellent\u003c\/td\u003e \u003ctd\u003eCompatible with standard blood bank enhancement media.\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eAHG (anti-human globulin) reagent\u003c\/td\u003e \u003ctd\u003eExcellent\u003c\/td\u003e \u003ctd\u003eCompatible with standard blood bank AHG reagents.\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e \u003ch2\u003eClinical \u0026amp; Research Laboratory Applications\u003c\/h2\u003e \u003cp\u003eCaplugs® Evergreen 3.5 mL fine tip transfer pipets serve point-of-care testing, immunoassay, and molecular diagnostics laboratories requiring controlled small-volume dispensing in the ~20 µL range. Lateral flow immunoassay (LFA) and rapid diagnostic test (RDT) platforms specify sample application volumes of 15–25 µL — the standard transfer pipet over-delivers at 45 µL, while the fine tip's ~20 µL drop closely matches the target application volume. Immunochromatography test well dispensing for HIV, malaria, influenza, and SARS-CoV-2 RDT platforms use fine tip transfer pipets for single-drop specimen application. In research settings, fine tip pipets are used for microtiter plate seed dispensing, immunofluorescence spot preparation, and any micro-volume transfer where the standard tip's larger drop results in spillover or excess volume.\u003c\/p\u003e \u003ch2\u003eU.S. Manufacturing, Quality \u0026amp; Institutional Procurement\u003c\/h2\u003e \u003cp\u003eCaplugs® Evergreen products are manufactured in the United States under ISO 9001 quality management from FDA-compliant, food-contact-grade resins. BPA-free, phthalate-free, and latex-free, with material-disclosure documentation supporting CAP, CLIA, and ISO 15189 laboratory accreditation audits.\u003c\/p\u003e \u003cp\u003eLabSupplies.com is an authorized dealer for the full Caplugs Evergreen catalog and ships directly from USA inventory — typically same business day for stocking SKUs. We offer below retail pricing on volume orders, tiered institutional and academic pricing, and direct support for grant-funded laboratories and government procurement channels. Lab managers and procurement officers can \u003ca href=\"#request-sample\"\u003erequest a written quote or speak with a product specialist\u003c\/a\u003e directly from our sales engineering team.\u003c\/p\u003e \u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e \u003ch3\u003eAre the transfer pipets sterile?\u003c\/h3\u003e \u003cp\u003eYes. Each pipet is individually sterile-packed. Sterility is maintained until the individual wrapper is opened. Single-use — discard after use.\u003c\/p\u003e \u003ch3\u003eWhat application requires a fine tip vs a standard tip transfer pipet?\u003c\/h3\u003e \u003cp\u003eUse the fine tip (20 µL drop) when the target application volume is 15–25 µL — lateral flow assay sample loading, POC test well dispensing, and microtiter plate seeding. Use the standard tip (45 µL drop) for general transfer where larger volumes per squeeze are acceptable. The fine tip provides approximately half the volume per squeeze of the standard.\u003c\/p\u003e \u003ch3\u003eCan LDPE transfer pipets be used with organic solvents?\u003c\/h3\u003e \u003cp\u003eLDPE is compatible with dilute aqueous reagents, serum, plasma, and standard biological matrices. Short-term contact with ethanol (\u0026lt;70%) or methanol (\u0026lt;50%) is generally acceptable. LDPE is not suitable for acetonitrile, acetone, dichloromethane, chloroform, or concentrated organic solvents — use glass or PTFE instruments for organic solvent transfer.\u003c\/p\u003e \u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\/\", \"@type\": \"Product\", \"name\": \"Caplugs® Evergreen 222-1590-02I | 3.5 mL Fine Tip Transfer Pipets, 20 µL Drop — Sterile, LDPE, Natural, 400\/Bag\", \"sku\": \"222159002IE1\", \"mpn\": \"222-1590-02I\", \"brand\": {\"@type\": \"Brand\", \"name\": \"Caplugs® Evergreen\"}, \"manufacturer\": {\"@type\": \"Organization\", \"name\": \"Caplugs® Evergreen\", \"address\": \"USA\"}, \"material\": \"Low-Density Polyethylene (LDPE)\", \"color\": \"Natural\", \"image\": \"https:\/\/prod-cp-cdn-images.azureedge.net\/catalog\/92300\/9093F9E9-0629-4E5F-B21B-39C8A1BB4B87\/230-1590-020_01.jpg\", \"description\": \"Caplugs® Evergreen 222-1590-02I: 3.5 mL Fine Tip Transfer Pipets, 20 µL Drop, Sterile, LDPE, Natural, 400\/Bag. MADE IN USA, authorized dealer.\", \"additionalProperty\": [{\"@type\": \"PropertyValue\", \"name\": \"Capacity\", \"value\": \"3.5 mL\"}, {\"@type\": \"PropertyValue\", \"name\": \"Tip Type\", \"value\": \"Fine Tip\"}, {\"@type\": \"PropertyValue\", \"name\": \"Drop Size\", \"value\": \"~20 µL\"}, {\"@type\": \"PropertyValue\", \"name\": \"Pack Size\", \"value\": \"400\/Bag\"}, {\"@type\": \"PropertyValue\", \"name\": \"Sterility\", \"value\": \"Sterile\"}, {\"@type\": \"PropertyValue\", \"name\": \"Origin\", \"value\": \"USA\"}], \"offers\": {\"@type\": \"Offer\", \"priceCurrency\": \"USD\", \"price\": \"77.00\", \"availability\": \"https:\/\/schema.org\/InStock\", \"url\": \"https:\/\/labsupplies.com\/products\/222-1590-02i-transfer-pipet-fine-tip\"}}\u003c\/script\u003e \u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\/\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Are the 222-1590-02I transfer pipets sterile?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. Each pipet is individually sterile-packed. Sterility is maintained until the individual wrapper is opened. Single-use — discard after use.\"}}, {\"@type\": \"Question\", \"name\": \"What application requires a fine tip vs a standard tip transfer pipet?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Use the fine tip (20 µL drop) when the target application volume is 15–25 µL — lateral flow assay sample loading, POC test well dispensing, and microtiter plate seeding. Use the standard tip (45 µL drop) for general transfer where larger volumes per squeeze are acceptable. The fine tip provides approximately half the volume per squeeze of the standard.\"}}, {\"@type\": \"Question\", \"name\": \"Can LDPE transfer pipets be used with organic solvents?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"LDPE is compatible with dilute aqueous reagents, serum, plasma, and standard biological matrices. Short-term contact with ethanol (\u003c70%) or methanol (\u003c50%) is generally acceptable. LDPE is not suitable for acetonitrile, acetone, dichloromethane, chloroform, or concentrated organic solvents — use glass or PTFE instruments for organic solvent transfer.\"}}]}\u003c\/script\u003e","brand":"Caplugs® Evergreen","offers":[{"title":"Default Title","offer_id":48567095066856,"sku":"222159002IE1","price":77.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0694\/5361\/1240\/files\/230-1590-020_01_f06ef9de-997e-4e73-817d-85792162d70d.jpg?v=1779031778","url":"https:\/\/labsupplies.com\/products\/222-1590-02i-transfer-pipet-fine-tip","provider":"LabSupplies.com","version":"1.0","type":"link"}