{"product_id":"caplugs-230-1681-03k-200l-pipet-tips-po-natural","title":"10–200 µL Pipet Tips, Two-Step Tiered, PP, Natural — 230-1681-03K | 1,000\/Bag | Caplugs® Evergreen","description":"\u003ch2\u003e10–200 µL Visu-Chek™ Two-Step Tiered Pipet Tips — Multi-Fitting, Natural PP, 1,000\/Bag (230-1681-03K)\u003c\/h2\u003e\n\u003cp\u003eThe Caplugs® Evergreen Visu-Chek™ 10–200 µL pipet tips are precision-molded from virgin polypropylene in a two-step tiered, multi-fitting design that seals positively across a wide range of pipettor brands without the cost premium of single-brand OEM sourcing. Natural (clear) construction provides full sample visibility during aspiration and dispensing, and a graduated Visu-Chek™ scale along the tip wall gives technicians immediate visual volume confirmation — reducing pipetting errors in serial dilutions, PCR master mix preparation, and plate-loading workflows. Supplied non-sterile in a 1,000\/Bag pack, these tips are lot-certified RNase-free, DNase-free, and pyrogen-free for demanding nucleic acid, immunoassay, and clinical diagnostic applications.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number (MPN)\u003c\/td\u003e\n\u003ctd\u003e230-1681-03K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSub-brand\u003c\/td\u003e\n\u003ctd\u003eVisu-Chek™\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolume Range\u003c\/td\u003e\n\u003ctd\u003e10–200 µL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTip Style\u003c\/td\u003e\n\u003ctd\u003eTwo-Step Tiered, Multi-fitting\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003ePolypropylene (PP), virgin resin\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColor\u003c\/td\u003e\n\u003ctd\u003eNatural (clear)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSterility\u003c\/td\u003e\n\u003ctd\u003eNon-Sterile\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePack Size\u003c\/td\u003e\n\u003ctd\u003e1,000\/Bag\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertifications\u003c\/td\u003e\n\u003ctd\u003eRNase-free, DNase-free, pyrogen-free (lot-tested)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBPA \/ Phthalates\u003c\/td\u003e\n\u003ctd\u003eBPA-free; no phthalate plasticizers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCountry of Origin\u003c\/td\u003e\n\u003ctd\u003eUSA (California)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003ePCR master mix preparation and template addition across the full 10–200 µL working range\u003c\/li\u003e\n\u003cli\u003eELISA reagent and sample dispensing requiring accurate, repeatable volume delivery\u003c\/li\u003e\n\u003cli\u003eSerial dilutions in clinical chemistry, immunology, and QC workflows\u003c\/li\u003e\n\u003cli\u003eNucleic acid extraction and quantification where RNase\/DNase-free purity is mandatory\u003c\/li\u003e\n\u003cli\u003eGeneral liquid handling and sample transfer in research, clinical, and quality-control labs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThe two-step tiered, multi-fitting shaft geometry of these tips is validated for a broad range of pipettor brands in the 10–200 µL class. Confirmed compatible instruments include the Eppendorf® Research and Reference Plus series, Gilson Pipetman® P200, Thermo Fisher Finnpipette® F1\/F2, VWR® Signature™, Labnet® MultiPette, Oxford® BenchMate, and Socorex Acura® pipettors. This versatility makes part number 230-1681-03K an effective single-SKU solution for mixed-brand pipettor environments. As pipettor shaft tolerances can vary by production batch, it is good practice to perform a 5-tip aspiration validation test before committing to a large-volume purchase. For labs using color-coded tip management, a yellow equivalent (10–200 µL) is also available from the Visu-Chek™ line.\u003c\/p\u003e\n\n\u003ch2\u003eChemical Resistance\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eReagent \/ Condition\u003c\/th\u003e\n\u003cth\u003eCompatibility\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAqueous buffers and saline\u003c\/td\u003e\n\u003ctd\u003eExcellent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDilute acids and bases\u003c\/td\u003e\n\u003ctd\u003eExcellent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEthanol (\u0026lt;70%)\u003c\/td\u003e\n\u003ctd\u003eGood — short-term contact\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsopropanol (\u0026lt;50%)\u003c\/td\u003e\n\u003ctd\u003eGood — short-term contact\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAcetone \/ chloroform \/ aromatic solvents\u003c\/td\u003e\n\u003ctd\u003eNot recommended\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAutoclave sterilization\u003c\/td\u003e\n\u003ctd\u003eCompatible (PP is autoclavable; tips are supplied non-sterile)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eQuality \u0026amp; Procurement\u003c\/h2\u003e\n\u003cp\u003eMade in USA (California), these Caplugs® Evergreen Visu-Chek™ tips are manufactured from virgin, BPA-free, phthalate-free polypropylene under ISO 9001 quality management, with every production lot tested and certified RNase-free, DNase-free, and pyrogen-free. LabSupplies.com is an authorized Caplugs® Evergreen dealer, shipping from USA inventory with same-business-day fulfillment available on stocking items. Volume pricing and institutional blanket-order programs are available for high-throughput labs and grant-funded procurement.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eAre these tips certified RNase-free and DNase-free?\u003c\/strong\u003e\u003cbr\u003eYes — every production lot is tested and certified RNase-free, DNase-free, and pyrogen-free, making them appropriate for nucleic acid work, PCR setup, and clinical diagnostic liquid handling where sample integrity is critical.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWill these tips fit my Eppendorf or Gilson pipettor?\u003c\/strong\u003e\u003cbr\u003eThe two-step tiered, multi-fitting geometry is validated for Eppendorf® Research and Reference Plus pipettors as well as the Gilson Pipetman® P200, among other major brands. Because shaft tolerances can vary, Caplugs® Evergreen recommends a 5-tip aspiration test before switching from your current OEM supply in high-volume workflows.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhy choose natural (clear) tips over colored tips?\u003c\/strong\u003e\u003cbr\u003eNatural polypropylene lets you see the entire sample column during aspiration and dispensing — immediately confirming the absence of air gaps and complete liquid delivery without having to infer volume from tip position alone. The Visu-Chek™ graduated scale on the tip wall adds an additional visual reference for volume confirmation.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan these tips be autoclaved for sterile technique?\u003c\/strong\u003e\u003cbr\u003ePolypropylene is autoclavable; however, these tips are sold non-sterile and are not validated for sterile filtration or aseptic cell-culture transfer as supplied. Labs requiring a sterile tip should look for a pre-sterilized format or autoclave the bulk tips in-house following your institutional SOP.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\/\",\"@type\":\"Product\",\"name\":\"Visu-Chek™ 10–200 µL Two-Step Tiered Multi-Fitting Pipet Tips, Natural PP, Non-Sterile, 1,000\/Bag\",\"sku\":\"230-1681-03K\",\"mpn\":\"230-1681-03K\",\"brand\":{\"@type\":\"Brand\",\"name\":\"Caplugs® Evergreen\"},\"material\":\"Polypropylene (PP)\",\"color\":\"Natural\",\"offers\":{\"@type\":\"Offer\",\"priceCurrency\":\"USD\",\"price\":\"62.30\",\"availability\":\"https:\/\/schema.org\/InStock\"}}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\/\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Are these tips certified RNase-free and DNase-free?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes — every production lot is tested and certified RNase-free, DNase-free, and pyrogen-free, making them appropriate for nucleic acid work, PCR setup, and clinical diagnostic liquid handling where sample integrity is critical.\"}},{\"@type\":\"Question\",\"name\":\"Will these tips fit my Eppendorf or Gilson pipettor?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The two-step tiered, multi-fitting geometry is validated for Eppendorf® Research and Reference Plus pipettors as well as the Gilson Pipetman® P200, among other major brands. 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