Caplugs® Evergreen 19 mL Round Bottom Test Tubes, Polystyrene (PS), 16 x 125 mm, Green Screw Caps, Natural, 1000/Bag
The Caplugs® Evergreen 19 mL Round Bottom Test Tubes deliver clear, rigid polystyrene tubes sized at 16 x 125 mm for sample collection, reagent aliquoting, and routine specimen handling. Each non-sterile tube ships unassembled with a green screw cap, giving labs flexible storage and a secure seal when ready for use.
Technical Specifications
| Product Type | Round Bottom Test Tubes |
| Volume/Size | 19 mL, 16 x 125 mm |
| Material | Polystyrene (PS) |
| Closure/Cap | Green Screw Cap (unassembled) |
| Color | Natural (tube) |
| Sterility | Non-Sterile |
| Pack Size | 1000/Bag |
| Country of Origin | USA |
Applications
- General sample and specimen collection at the bench
- Reagent and buffer aliquoting for routine assays
- Short-term storage of liquid and solid samples
- Optical inspection of samples through clear PS walls
- Mixing and dilution preparation in clinical and research labs
- Sample organization in standard 16 mm tube racks
Quality & Procurement
labsupplies.com is an authorized Caplugs® Evergreen dealer shipping from US inventory, and these tubes are Made in USA. Each bag carries lot numbers to support traceability for CAP-, CLIA-, and ISO 15189-accredited laboratories. Institutional and grant-funded tiered pricing is available for bulk procurement.
Frequently Asked Questions
Are these tubes shipped with the caps attached?
No. These tubes ship unassembled, meaning the green screw caps are packaged separately within the 1000/Bag count so you can apply them as needed.
What is the tube material, and is it autoclavable?
The tubes are molded from polystyrene (PS), a clear, rigid resin. PS is not autoclavable and should not be exposed to high-temperature sterilization; use them as non-sterile consumables.
What volume and dimensions do these tubes have?
Each tube holds 19 mL and measures 16 x 125 mm, fitting standard 16 mm tube racks and centrifuge adapters designed for that diameter.
Are these tubes sterile?
No. These are non-sterile tubes intended for general laboratory sample handling, storage, and reagent preparation where sterility is not required.