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.
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.
