{"product_id":"222-1595-02i-transfer-pipet-long-stem","title":"3.5 mL Centrifuge Tubes, Graduated, LDPE, Natural — 222-1595-02I | 400\/Bag | Caplugs® Evergreen","description":"\u003ch2\u003eQuick Reference\u003c\/h2\u003e \u003ctable\u003e \u003ctbody\u003e \u003ctr\u003e \u003cth\u003ePart Number\u003c\/th\u003e \u003ctd\u003e222-1595-02I\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\u003eLong Stem\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003cth\u003eTip Detail\u003c\/th\u003e \u003ctd\u003eextended stem length for reaching the bottom of tall or narrow containers\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003cth\u003eDrop Size\u003c\/th\u003e \u003ctd\u003e~40 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\u003edeep container access — dispensing into tall tubes, narrow vessels, bottom-of-container sample recovery, and extended reach workflows\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$110.60\/Bag ($0.2766\/pipet)\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e \u003ch2\u003eTechnical Narrative\u003c\/h2\u003e \u003cp\u003eThe Caplugs® Evergreen \u003cstrong\u003e222-1595-02I\u003c\/strong\u003e is a \u003cstrong\u003e3.5 mL Long Stem Transfer Pipet\u003c\/strong\u003e, sterile, LDPE (Natural), 400\/Bag individually packed. The extended stem reaches the bottom of tall tubes, narrow-neck containers, and deep 50 mL conical tube volumes where a standard-stem pipet cannot access the container base. In blood banking, the long stem allows complete plasma or cell resuspension from the bottom of 50 mL centrifuge tubes after large-volume centrifugation. In serology and microbiology, the long stem reaches specimen material in tall collection tubes without bending or tilting the container.\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$110.60\/Bag\u003c\/strong\u003e, \u003cstrong\u003e$0.2766\/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 (222-1590-02I, 20 µL, 400\/Bag); Long Stem (, 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\u003eLong Stem\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003cth\u003eTip Detail\u003c\/th\u003e \u003ctd\u003eextended stem length for reaching the bottom of tall or narrow containers\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003cth\u003eDrop Size\u003c\/th\u003e \u003ctd\u003e~40 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 long stem transfer pipet, sterile, LDPE, 400\/Bag)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003cth\u003ePrimary Application\u003c\/th\u003e \u003ctd\u003edeep container access — dispensing into tall tubes, narrow vessels, bottom-of-container sample recovery, and extended reach workflows\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$110.60\/Bag ($0.2766\/pipet)\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e \u003ch2\u003e3.5 mL Long Stem Transfer Pipet Applications\u003c\/h2\u003e \u003cp\u003eThe is suited to the following laboratory workflows where the long stem 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\u003e50 mL conical tube aspirate\u003c\/th\u003e \u003ctd\u003ePost-centrifuge plasma\/serum aspirate\u003c\/td\u003e \u003ctd\u003eReach bottom of 50 mL conical without tilting tube\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003cth\u003eTall tube specimen recovery\u003c\/th\u003e \u003ctd\u003eDeep collection tube sample recovery\u003c\/td\u003e \u003ctd\u003eExtended stem reaches full tube depth\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003cth\u003eBlood bank large-volume\u003c\/th\u003e \u003ctd\u003eLarge-volume plasma or cell transfer\u003c\/td\u003e \u003ctd\u003eLong stem for 50 mL tube bottom access in blood bank processing\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003cth\u003eMicrobiology deep tube\u003c\/th\u003e \u003ctd\u003eBroth or agar-deep tube inoculation\u003c\/td\u003e \u003ctd\u003eLong stem for deep tube access without contamination\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003cth\u003eNarrow-neck bottle\u003c\/th\u003e \u003ctd\u003eNarrow bottle or flask dispensing\u003c\/td\u003e \u003ctd\u003eLong stem extends into narrow-neck containers\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003cth\u003eDeep well plate\u003c\/th\u003e \u003ctd\u003eDeep-well plate aspiration (2 mL wells)\u003c\/td\u003e \u003ctd\u003eLong stem reaches deep well plate bottom\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003cth\u003eEnvironmental sampling\u003c\/th\u003e \u003ctd\u003eBottom-of-container sample recovery\u003c\/td\u003e \u003ctd\u003eExtended reach for complete residual volume recovery\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 long stem transfer pipets serve blood bank, microbiology, and cell biology laboratories requiring full bottom-of-container access in tall or deep vessels. Blood bank plasma processing laboratories use long stem pipets to aspirate plasma from the bottom of 50 mL conical tubes after large-volume centrifugation — the extended stem reaches the tube base without tilting the tube and risking cell pellet disturbance. Microbiology labs use long stem pipets for deep tube inoculation of semi-solid agar deep tubes, motility test medium, and other deep-tube culture formats where a standard-stem pipet cannot reach the target depth without contaminating the tube wall. Deep-well plate workflows and narrow-neck flask transfers use the long stem for complete residual volume recovery from the container base.\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\u003eHow much longer is the long stem compared to the standard stem?\u003c\/h3\u003e \u003cp\u003eThe long stem extends the total pipet length beyond the standard format, providing additional reach for 50 mL conical tube bottom access and narrow deep-vessel transfer. Exact extension length may vary by lot — contact us for dimensional specifications if a precise minimum depth is required for your application.\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 222-1595-02I | 3.5 mL Long Stem Transfer Pipets, 40 µL Drop — Sterile, LDPE, Natural, 400\/Bag\", \"sku\": \"222159502IE1\", \"mpn\": \"222-1595-02I\", \"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\/230-1595-020_N9A1114.jpg\", \"description\": \"Caplugs® Evergreen 222-1595-02I: 3.5 mL Long Stem Transfer Pipets, 40 µL Drop, Sterile, LDPE, Natural, 400\/Bag. 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