Caplugs® Evergreen 5 mL Calibrated Round Bottom Test Tubes, 13 x 75 mm, Polypropylene, Natural, 500/Bag
These 5.0 mL calibrated round bottom test tubes are molded from polypropylene (PP) in a natural, semi-translucent finish for routine sample handling, reagent aliquoting, and benchtop dilutions. The 13 x 75 mm footprint fits standard tube racks and many tabletop centrifuge rotors, making them a versatile workhorse across clinical, research, and teaching labs.
Technical Specifications
| Product Type | Calibrated Round Bottom Test Tubes |
| Volume/Size | 5.0 mL, 13 x 75 mm |
| Material | Polypropylene (PP) |
| Graduation | Calibrated (graduated) |
| Color | Natural |
| Sterility | Non-Sterile |
| Pack Size | 500/Bag |
| Country of Origin: USA | USA |
Applications
- Reagent and buffer aliquoting at the bench
- Serial dilutions and sample preparation
- Short-spin pelleting in tabletop centrifuges accepting 13 x 75 mm tubes
- Specimen collection and routine sample transfer
- Educational and teaching lab exercises
- General storage of non-corrosive liquids and solutions
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 so traceability is straightforward for CAP-, CLIA-, and ISO 15189-accredited workflows. Institutional and grant-funded tiered pricing is available — contact us for volume quotes on multi-bag orders.
Frequently Asked Questions
Are these test tubes sterile?
No. These tubes ship non-sterile and are intended for general laboratory use. If your protocol requires sterility, the tubes can be autoclaved; validate parameters against your own sterilization equipment before use.
Can polypropylene tubes be autoclaved?
Yes. Polypropylene tolerates standard steam autoclaving at 121 °C. Confirm cycle time and load configuration with your facility's procedures, as repeated cycles may affect tube clarity over time.
Will 13 x 75 mm tubes fit standard racks and centrifuges?
The 13 x 75 mm dimension is a widely used industry format compatible with most standard 13 mm tube racks and many tabletop centrifuge rotors. Check your rotor's tube specification to confirm fit and rated speed.
Do these tubes include caps?
No closure is listed in the specification; these are supplied as open round bottom tubes. Compatible 13 mm closures may be ordered separately if your application requires sealing.