Globe Scientific Universal Tube Caps, Polyethylene Snap Cap, Fits Most 12, 13 & 16 mm Tubes — Clear or Lavender, 1000/Pack
Standardize tube closures across your bench with Globe Scientific Universal Tube Caps, a one-size snap cap that seats securely on most 12 mm, 13 mm and 16 mm round-bottom tubes. Lab teams rely on these caps for sample storage, specimen transport, and color-coded organization of culture or collection tubes — reducing the need to stock multiple closure SKUs.
Technical Specifications
| Product Type | Universal Snap Cap |
| Volume/Size | Fits most 12 mm, 13 mm and 16 mm OD tubes |
| Material | Polyethylene (PE) |
| Closure/Cap | Push-on snap cap |
| Sterility | Non-sterile |
| Pack Size | 1000 caps per pack |
Available Colors
| Clear/Natural | 118115C | $57.80 |
| Lavender | 118115L | $57.80 |
Applications
- Sealing 13 mm and 16 mm culture tubes during incubation and short-term storage
- Color-coding specimen tubes by patient, study arm, or processing batch
- Capping blood collection and serology tubes for transport between departments
- Closing assay or aliquot tubes in clinical and research workflows
- Replacing lost or damaged closures across mixed 12–16 mm tube inventories
- Organizing archived samples in racks where visual identification speeds retrieval
Chemical Resistance
| Aqueous buffers | Excellent |
| Dilute acids | Good |
| Dilute bases | Good |
| Alcohols | Good |
| Acetonitrile | Fair |
| Aromatic solvents | Poor |
| Chlorinated solvents | Poor |
Quality & Procurement
labsupplies.com is an authorized Globe Scientific dealer shipping from US inventory for fast fulfillment. Each pack carries lot numbers supporting traceability for CAP-, CLIA-, and ISO 15189-accredited laboratories. Institutional and grant-funded tiered pricing is available — contact our procurement team for volume quotes on standing orders.
Frequently Asked Questions
Will one cap size really fit 12, 13 and 16 mm tubes?
Yes. The universal design seats on most tubes within the 12–16 mm outer-diameter range. Because tube tolerances vary by manufacturer, we recommend testing fit with your specific tubes before standardizing a large order.
Are these caps sterile?
No, these closures are supplied non-sterile. For applications requiring sterility, the caps can be used inside a controlled workflow or paired with separately validated sterilization steps appropriate to polyethylene.
What is the difference between the clear and lavender caps?
Function and fit are identical; only the color differs. Choose clear/natural for neutral storage or lavender to visually separate sample sets, study groups, or processing batches at a glance.
How many caps come in each pack?
Each pack contains 1000 caps. Pricing shown is per 1000-cap pack, and tiered discounts apply to larger institutional orders.