250–500 µL Two-Step Tiered Pipet Tips — Oxford®/Abbott®/Pfizer®/Quickpette® Replacement, Yellow PP, 1000/Bag
These 250–500 µL polypropylene pipet tips feature a two-step tiered shaft design engineered as a direct replacement for Oxford®, Abbott®, Pfizer®, and Quickpette® pipettors in the 250–500 µL volume class. Supplied non-sterile in bulk 1000/Bag packaging, the yellow color coding aligns with the internationally recognized convention for medium-volume tips, enabling fast visual identification at the bench without retraining staff. The BPA-free, phthalate-free polypropylene construction delivers broad chemical resistance across the aqueous buffers, dilute acids and bases, and common organic solvents encountered in clinical, research, and pharmaceutical workflows.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (MPN) | 230-1092-Y3K |
| Volume Range | 250–500 µL |
| Tip Design | Two-Step Tiered |
| Material | Polypropylene (PP) |
| Color | Yellow |
| Sterility | Non-Sterile |
| Pack Size | 1000/Bag |
| BPA / Phthalate Free | Yes |
| Country of Origin | USA |
Applications
- Sample preparation and specimen processing in clinical and hospital laboratories
- Reagent dispensing and serial dilutions in research and pharmaceutical workflows
- ELISA plate loading and immunoassay setup in the 250–500 µL range
- General liquid handling in biotech, CRO, and quality-control laboratories requiring medium-volume tips
Compatibility
The two-step tiered shaft geometry of these tips matches the specific tip-channel taper profile of Oxford®, Abbott®, Pfizer®, and Quickpette® pipettors, providing secure tip retention, an airtight seal, and accurate volume delivery across the full 250–500 µL working range. Laboratories currently purchasing OEM tips for any of these pipettor lines can evaluate part number 230-1092-Y3K as a direct drop-in alternative. As pipettor manufacturers offer multiple volume models with different tip-channel dimensions, confirm that your specific instrument model falls within the 250–500 µL class before transitioning from OEM supply.
Chemical Resistance
| Reagent / Condition | Compatibility |
|---|---|
| Aqueous buffers / saline | Excellent |
| Dilute acids | Excellent |
| Dilute bases | Excellent |
| Methanol / isopropanol | Good — short-term contact |
| Acetonitrile | Good — short-term contact |
| Aromatic / chlorinated solvents | Not recommended |
Quality & Procurement
Made in USA, Caplugs® Evergreen pipet tips are produced from FDA-compliant, BPA-free, phthalate-free polypropylene resin under ISO 9001 quality management, supporting lot traceability requirements for CAP-, CLIA-, and ISO 15189-accredited laboratories. LabSupplies.com is an authorized dealer of Caplugs® Evergreen consumables and ships from USA inventory, with tiered volume pricing available for institutional, hospital, and grant-funded procurement.
Frequently Asked Questions
Are these tips sterile?
No — they are supplied non-sterile in 1000/Bag bulk packaging, which is appropriate for the vast majority of general bench, clinical chemistry, and research pipetting applications that do not require sterile tips.
Which specific pipettor brands do these tips fit?
These tips are designed as replacements for Oxford®, Abbott®, Pfizer®, and Quickpette® pipettors in the 250–500 µL volume class. The two-step tiered geometry replicates the OEM shaft taper required for a secure, leak-free fit on those instruments.
Can polypropylene tips be used with organic solvents?
Polypropylene offers good resistance to aqueous buffers, dilute acids and bases, methanol, isopropanol, and acetonitrile during short-term contact. Prolonged exposure to aromatic or chlorinated solvents such as toluene or chloroform is not recommended, as these can degrade PP over time.
Are these tips autoclavable?
Polypropylene is generally autoclavable; however, the source documentation for this product does not include a validated autoclaving specification. Contact LabSupplies.com for guidance before autoclaving if sterility is required for your application.