PosiStop 1000 µL Low-Retention Filter Pipette Tips, Sterile & Graduated — 3 Packaging Formats The Globe Scientific PosiStop Filter Pipette Tip (1000 µL) delivers aerosol-barrier protection with a low-retention surface for accurate, contamination-controlled liquid handling. These sterile, graduated tips suit demanding workflows such as PCR and qPCR setup, NGS library prep, and serial dilutions where sample carryover and cross-contamination must be minimized. Technical Specifications Product Type Filter (aerosol barrier) pipette tip Volume/Size 1000 µL Material Virgin polypropylene, low-retention surface Closure/Cap Integrated self-sealing filter barrier Graduation Graduated Sterility Sterile Pack Size Bulk bag of 1000; or 96/rack, 6 racks/box (576/box) Available Packagings Bulk Bag, Sterile (1000/bag) 154335S $129.50 Racked, Sterile (96/rack, 6 racks/box) 154335RS $97.30 GreenRack, Sterile (96/rack, 6 racks/box) 154335ERS $92.00 Applications PCR and qPCR reaction setup requiring aerosol-barrier protection Next-generation sequencing library preparation Serial dilutions and standard curve preparation Transfer of viscous or high-value samples needing low retention Cell culture media and reagent dispensing under sterile conditions Forensic and molecular diagnostic sample handling Quality & Procurement Ordered through labsupplies.com, an authorized Globe Scientific dealer shipping from US inventory. Bags and boxes carry lot numbers, supporting traceability for CAP-, CLIA-, and ISO 15189-accredited laboratories. Frequently Asked Questions What does the low-retention surface do? The low-retention treatment reduces liquid clinging to the tip wall, improving recovery of viscous, surfactant-containing, or high-value samples and yielding more reproducible pipetting. Are these tips sterile and nuclease-free? Yes. All three formats ship sterile. PosiStop filter tips are manufactured for molecular workflows where DNase, RNase, and pyrogen contamination must be avoided. Confirm specific certifications on the lot documentation. How do the racked and GreenRack formats differ? Both provide 96 tips per rack across 6 racks per box. The GreenRack format (154335ERS) uses a more sustainable rack design while delivering the same tip performance and sterility. Which pipettes are these tips compatible with? The 1000 µL PosiStop tips are designed for standard single- and multichannel air-displacement pipettes in the 100–1000 µL range. Verify fit against your specific pipette model before standardizing. { "@context": "https://schema.org", "@type": "Product", "name": "Globe Scientific PosiStop 1000 µL Low-Retention Filter Pipette Tips, Sterile", "brand": { "@type": "Brand", "name": "Globe Scientific" }, "description": "Sterile, graduated, low-retention 1000 µL filter pipette tips for PCR, qPCR, and NGS workflows. Available in bulk bag, racked, and GreenRack formats.", "offers": [ { "@type": "Offer", "sku": "154335S", "price": "129.50", "priceCurrency": "USD", "availability": "https://schema.org/InStock" }, { "@type": "Offer", "sku": "154335RS", "price": "97.30", "priceCurrency": "USD", "availability": "https://schema.org/InStock" }, { "@type": "Offer", "sku": "154335ERS", "price": "92.00", "priceCurrency": "USD", "availability": "https://schema.org/InStock" } ], "lowPrice": "92.00", "priceCurrency": "USD" } { "@context": "https://schema.org", "@type": "FAQPage", "mainEntity": [ { "@type": "Question", "name": "What does the low-retention surface do?", "acceptedAnswer": { "@type": "Answer", "text": "The low-retention treatment reduces liquid clinging to the tip wall, improving recovery of viscous, surfactant-containing, or high-value samples and yielding more reproducible pipetting." } }, { "@type": "Question", "name": "Are these tips sterile and nuclease-free?", "acceptedAnswer": { "@type": "Answer", "text": "Yes. All three formats ship sterile. PosiStop filter tips are manufactured for molecular workflows where DNase, RNase, and pyrogen contamination must be avoided. Confirm specific certifications on the lot documentation." } }, { "@type": "Question", "name": "How do the racked and GreenRack formats differ?", "acceptedAnswer": { "@type": "Answer", "text": "Both provide 96 tips per rack across 6 racks per box. The GreenRack format (154335ERS) uses a more sustainable rack design while delivering the same tip performance and sterility." } }, { "@type": "Question", "name": "Which pipettes are these tips compatible with?", "acceptedAnswer": { "@type": "Answer", "text": "The 1000 µL PosiStop tips are designed for standard single- and multichannel air-displacement pipettes in the 100–1000 µL range. Verify fit against your specific pipette model before standardizing." } } ] }