Globe Scientific
1000 µL PosiStop Pipette Tips, Graduated — Bulk, Racked, GreenRack & Refill, Sterile & Non-Sterile | Globe Scientific
1000 µL PosiStop Pipette Tips, Graduated — Bulk, Racked, GreenRack & Refill, Sterile & Non-Sterile | Globe Scientific
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1000 µL PosiStop Graduated Pipette Tips — Bulk, Racked, GreenRack & Refill (8 Packaging Options)
Globe Scientific PosiStop Pipette Tips deliver a defined positive-stop collar that seats the tip consistently on the pipette shaft, improving seal reliability and run-to-run reproducibility for liquid handling. Graduated markings support visual volume confirmation during serial dilutions, reagent aliquoting, and PCR/qPCR setup. Choose from bulk, pre-racked, eco-friendly GreenRack, and refill formats in sterile or non-sterile.
Technical Specifications
| Product Type | PosiStop universal pipette tip, positive-stop collar |
|---|---|
| Volume/Size | 1000 µL (1 mL) |
| Material | Virgin polypropylene |
| Closure/Cap | N/A — open pipette tip |
| Graduation | Graduated for visual volume reference |
| Sterility | Available sterile and non-sterile |
| Pack Size | Bulk: 1000/bag; Racked/GreenRack: 96/rack, 6 racks/box (576/box); Refill: 96/refill, 6 refills/box (576/box) |
Available Packagings
| Packaging | SKU | Price (per pack) |
|---|---|---|
| Bulk Bag (1000/bag) | 154035 | $29.10 |
| Bulk Bag, Sterile (1000/bag) | 154035S | $38.40 |
| Racked (96/rack, 6 racks/box) | 154035R | $49.00 |
| Racked, Sterile (96/rack, 6 racks/box) | 154035RS | $56.40 |
| GreenRack (96/rack, 6 racks/box) | 154035ER | $47.40 |
| GreenRack, Sterile (96/rack, 6 racks/box) | 154035ERS | $55.60 |
| Refill (96/refill, 6 refills/box) | 154035F | $29.30 |
| Refill, Sterile (96/refill, 6 refills/box) | 154035FS | $36.50 |
Applications
- Reagent aliquoting and master-mix dispensing in PCR/qPCR workflows
- Serial dilutions where graduated tips aid volume verification
- Buffer and media transfer in molecular biology and cell culture prep
- High-throughput plating using pre-racked or GreenRack formats
- Sterile sample handling for nucleic acid and microbiology work (sterile SKUs)
- Routine bench pipetting where bulk-bag economy is preferred
Quality & Procurement
Sold by labsupplies.com as an authorized Globe Scientific dealer, shipping from US inventory. Each bag, box, and refill carries lot numbers to support traceability for CAP-, CLIA-, and ISO 15189-accredited laboratories. Institutional and grant-funded tiered pricing is available — contact us for volume quotes across the PosiStop family.
Frequently Asked Questions
What does the "PosiStop" feature do?
The PosiStop collar provides a defined positive stop when the tip seats on the pipette shaft, promoting a consistent mounting depth and reliable seal for reproducible volume delivery.
What is the difference between the standard Racked and GreenRack formats?
Both supply 96 tips per rack, 6 racks per box. GreenRack uses a more material-efficient rack design intended to reduce plastic waste while remaining compatible with standard pipettes.
Are the refill formats compatible with reusable rack bases?
Yes. Refill inserts (96/refill, 6 refills/box) are designed to reload compatible rack bases, lowering per-tip cost and plastic use versus buying fully racked tips each time.
Which SKUs are certified sterile?
The sterile options are 154035S (bulk), 154035RS (racked), 154035ERS (GreenRack), and 154035FS (refill). Non-sterile SKUs are not suitable for applications requiring sterility assurance.
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