Universal Snap-On Tube Caps, Polyethylene — Fits Most 12mm, 13mm & 16mm Tubes, 1000/Bag
Globe Scientific Universal Tube Caps seal a wide range of glass and plastic test tubes with a single press-fit closure, simplifying inventory across the lab. Color-coding supports sample-tracking workflows in clinical chemistry, microbiology culture handling, and general specimen storage where rapid visual sorting prevents mix-ups at the bench.
Technical Specifications
| Product Type | Universal snap-on tube cap |
| Volume/Size | Fits most 12mm, 13mm and 16mm OD tubes |
| Material | Polyethylene (PE) |
| Closure/Cap | Press-fit snap cap |
| Graduation | Not applicable |
| Sterility | Non-sterile |
| Pack Size | 1000 caps per bag |
Available Colors
| Color | SKU | Price (per bag of 1000) |
| Yellow — Bag of 1000 | 118115Y | $57.80 |
| Red — Bag of 1000 | 118115R | $57.80 |
| Black — Bag of 1000 | 118115K | $57.80 |
| Green — Bag of 1000 | 118115G | $57.80 |
| Blue — Bag of 1000 | 118115B | $57.80 |
| Gray — Bag of 1000 | 118115A | $57.80 |
Applications
- Sealing 13mm and 16mm culture tubes during microbial incubation and storage
- Color-coding clinical chemistry specimen tubes by department or assay panel
- Capping glass tubes after dispensing reagents or standards
- Organizing sample racks by date, patient batch, or test type
- Replacing lost or damaged closures on multi-size tube inventories
- Short-term refrigerated storage of buffer aliquots and diluents
Chemical Resistance
| Reagent Class | Compatibility |
| Aqueous buffers | Excellent |
| Dilute acids | Good |
| Dilute bases | Good |
| Alcohols | Good |
| Acetonitrile | Limited |
| Aromatic solvents | Poor |
| Chlorinated solvents | Poor |
Quality & Procurement
labsupplies.com is an authorized Globe Scientific dealer shipping from US inventory. Bags carry lot numbers that support traceability for CAP-, CLIA-, and ISO 15189-accredited laboratories. Institutional and grant-funded tiered pricing is available — contact our team for volume quotes across multiple color SKUs.
Frequently Asked Questions
What tube diameters do these caps fit?
The universal design seats on most tubes with 12mm, 13mm, and 16mm outer diameters, letting one closure cover several common test-tube formats.
What material are the caps made from?
They are molded from polyethylene (PE), which offers good resistance to aqueous buffers, dilute acids, dilute bases, and alcohols. Avoid aromatic and chlorinated solvents.
Are these caps supplied sterile?
No. The caps are non-sterile and intended for general lab use, color-coding, and storage rather than aseptic applications.
How many caps come in each pack?
Each color ships in a bag of 1000 caps, priced per bag. Order individual colors by SKU or mix colors for departmental sorting.