20 µL PosiStop Pipette Tips, Graduated, Bulk Bag — 1000/Bag
Globe Scientific PosiStop Pipette Tips deliver a consistent positive-stop seat on compatible micropipettes, supporting reproducible 20 µL aspiration for PCR setup, serial dilutions, and routine reagent transfer. Molded graduations let bench scientists verify draw volumes at a glance, while the bulk bag format keeps high-throughput workflows stocked at a low per-tip cost.
Technical Specifications
| Product Type | PosiStop pipette tip |
|---|---|
| Volume/Size | 20 µL |
| Material | Virgin polypropylene |
| Closure/Cap | Open tip, positive-stop seating collar |
| Graduation | Molded graduations |
| Sterility | Non-sterile or sterile (variant-dependent) |
| Pack Size | 1000 tips per bulk bag |
Available Packagings
| Packaging | SKU | Price (per bag of 1000) |
|---|---|---|
| Bulk Bag | 154005 | $17.20 |
| Bulk Bag, Sterile | 154005S | $23.40 |
Applications
- PCR and qPCR master mix and template dispensing
- Serial dilution series for assay standard curves
- Reagent aliquoting in molecular biology workflows
- Loading low-volume samples for spectrophotometry
- Enzyme and buffer additions during kit-based protocols
- General microliter transfers at the analytical bench
Quality & Procurement
Order from labsupplies.com, an authorized Globe Scientific dealer shipping from US inventory. Each bulk bag carries lot numbers that support traceability for CAP-, CLIA-, and ISO 15189-accredited laboratories.
Frequently Asked Questions
What is the difference between SKU 154005 and 154005S?
Both are 20 µL graduated PosiStop tips in bags of 1000. SKU 154005 is non-sterile for general use, while 154005S is supplied sterile for nuclease-sensitive and contamination-critical applications.
Are these tips graduated?
Yes. Both packaging options feature molded graduations, allowing operators to visually confirm aspirated volume during low-volume pipetting.
How many tips are in each bag?
Each bulk bag contains 1000 tips. The listed price is per bag for both the sterile and non-sterile options.
Will PosiStop tips fit my pipette?
PosiStop tips are designed with a positive-stop collar for a consistent seat on compatible micropipettes. Confirm pipette compatibility against your instrument's tip specification before ordering.
