Caplugs® Evergreen Test Tube Stopper Caps, LDPE, Fuchsia, for 12 mm Test Tubes — 1000/Bag
These Test Tube Stopper Caps deliver a secure push-fit seal on standard 12 mm test tubes, supporting sample storage, short-term specimen retention, and color-coded sample organization. Molded from flexible LDPE, each fuchsia cap snaps on by hand and resists popping during routine bench handling and refrigerated storage.
Technical Specifications
| Product Type | Test Tube Stopper Caps |
| Volume/Size | For 12 mm test tubes |
| Material | LDPE (low-density polyethylene) |
| Closure/Cap | Push-fit stopper cap |
| Color | Fuchsia |
| Sterility | Non-Sterile |
| Pack Size | 1000/Bag |
| Country of Origin | USA |
Applications
- Sealing 12 mm culture and specimen tubes for short-term refrigerated storage
- Color-coding sample sets by patient, batch, or assay group
- Capping serology and hematology collection tubes after aliquoting
- Protecting tube contents from dust and evaporation on the bench
- Reagent and buffer aliquot storage in clinical and research labs
- Organizing tube racks in high-throughput sample processing workflows
Quality & Procurement
labsupplies.com is an authorized Caplugs® Evergreen dealer shipping these caps from US inventory. Manufactured in the USA, each bag carries lot numbers that support traceability for CAP-, CLIA-, and ISO 15189-accredited laboratories. Institutional and grant-funded tiered pricing is available for bulk and standing orders.
Frequently Asked Questions
What tube diameter do these stopper caps fit?
They are designed for 12 mm test tubes. Confirm the outer diameter of your tube rim, since fit on 12 mm tubes depends on the rim profile of your specific tube brand.
Are these caps sterile?
No. These caps are supplied non-sterile and are intended for general specimen storage and laboratory handling rather than aseptic or sterile sampling applications.
What material are the caps made from?
The caps are molded from LDPE (low-density polyethylene), a flexible polymer that allows the stopper to compress for a snug push-fit seal and recover during repeated capping.
How many caps come in each bag?
Each bag contains 1000 fuchsia stopper caps (1000/Bag), and pricing is listed per bag. Larger standing orders qualify for institutional tiered pricing.