Caplugs® Evergreen 3.4 mL Round Bottom Test Tubes, 12 x 50 mm, Polystyrene, Non-Sterile, Natural, 1000/Bag
These 3.4 mL round bottom test tubes are molded from clear polystyrene for high optical clarity, making them well suited to routine sample handling, colorimetric assays, and small-volume aliquoting at the bench. The 12 x 50 mm footprint fits standard small-tube racks and benchtop centrifuge adapters. Each natural, non-sterile tube ships in a bulk bag for high-throughput, cost-controlled lab workflows.
Technical Specifications
| Product Type | Round Bottom Test Tubes |
|---|---|
| Volume/Size | 3.4 mL, 12 x 50 mm |
| Material | Polystyrene (PS) |
| Color | Natural |
| Sterility | Non-Sterile |
| Pack Size | 1000/Bag |
| Country of Origin | USA |
Applications
- Routine sample collection and small-volume aliquoting
- Colorimetric and turbidimetric assays requiring clear-walled tubes
- Reagent dispensing and short-term sample storage
- Serial dilutions in clinical and research labs
- Reading optical density on small-tube photometers
- General education and teaching-lab benchwork
Quality & Procurement
labsupplies.com is an authorized Caplugs® Evergreen dealer shipping from US inventory, and these tubes are made in USA. Bags carry lot numbers to support traceability for CAP-, CLIA-, and ISO 15189-accredited laboratories. Institutional and grant-funded tiered pricing is available for high-volume and standing orders — contact our team for a quote.
Frequently Asked Questions
Are these test tubes sterile?
No. These are non-sterile polystyrene tubes intended for general benchwork. If your protocol requires sterility, autoclaving is not recommended for polystyrene; select a sterile or autoclavable alternative instead.
What is the actual capacity and dimension of each tube?
Each tube has a nominal capacity of 3.4 mL and measures 12 x 50 mm. The round bottom suits low-speed spins and full liquid recovery during pipetting.
Can these polystyrene tubes be centrifuged?
The 12 x 50 mm round bottom format fits common small-tube rotor adapters for low-speed clinical spins. Confirm your rotor's rated speed against polystyrene limits before use, as PS is less impact-resistant than polypropylene.
How many tubes come in each pack?
Each bag contains 1000 tubes (1000/Bag). Pricing shown is per bag, with tiered pricing available for institutional and grant-funded purchasing.