Globe Scientific Screw Caps for Microtubes, O-Ring Seal, Polypropylene — 6 Colors, 1000/Case
The Globe Scientific Screw Cap for Microtube with O-Ring delivers a secure, leak-resistant closure for microtube-based sample storage, cryogenic archiving, and color-coded specimen tracking. Molded from polypropylene with an integrated O-ring, each cap maintains a tight seal during freeze-thaw cycles and long-term biobanking. Six color options simplify sample sorting across busy bench and core-lab workflows.
Technical Specifications
| Product Type | Screw Cap for Microtube |
| Volume/Size | Microtube screw cap with integrated O-ring |
| Material | Polypropylene (cap), elastomer O-ring |
| Closure/Cap | Screw thread with O-ring seal |
| Graduation | Not applicable |
| Sterility | Non-sterile |
| Pack Size | 1000 caps per case |
Available Colors
| Yellow | 111671Y | $225.60 |
| White | 111671W | $225.60 |
| Red | 111671R | $225.60 |
| Green | 111671G | $225.60 |
| Clear | 111671C | $225.60 |
| Blue | 111671B | $225.60 |
Applications
- Long-term biobanking and specimen archiving with leak-resistant sealing
- Cryogenic sample storage through repeated freeze-thaw cycles
- Color-coded organization of patient, study, or assay groups
- Secure storage of DNA, RNA, and protein extracts
- Aliquoting reagents and standards for downstream PCR and sequencing
- Sample transport between satellite labs and central core facilities
Quality & Procurement
labsupplies.com is an authorized Globe Scientific dealer shipping from US inventory for fast fulfillment. Each case carries lot numbers, supporting sample traceability for CAP-, CLIA-, and ISO 15189-accredited laboratories. Institutional and grant-funded tiered pricing is available — contact our procurement team for volume quotes across multiple color SKUs.
Frequently Asked Questions
Do these screw caps fit all Globe Scientific microtubes?
These O-ring screw caps are designed to thread onto compatible Globe Scientific screw-top microtubes. Confirm your tube catalog number against thread format before ordering to ensure a correct seal match.
Are the caps supplied sterile?
No, these caps are non-sterile as shipped. If your protocol requires sterility, validate autoclave or alternative sterilization parameters against polypropylene heat tolerance before use.
Why choose an O-ring closure over a standard cap?
The integrated O-ring forms a positive seal that resists leakage and sample evaporation, making it well suited to long-term storage and cryogenic freeze-thaw conditions where reliable closure integrity matters.
Can I order multiple colors on one purchase order?
Yes. Each color is a separate SKU at $225.60 per case of 1000, and all six can be combined on a single order. Reach out for tiered institutional pricing across mixed-color quantities.