Caplugs® Evergreen 5 mL Round Bottom Test Tubes, 12 x 75 mm, Polystyrene, Natural, 1000/Bag
These 5 mL round bottom test tubes are molded from optically clear polystyrene in a standard 12 x 75 mm format, making them a workhorse for flow cytometry sample prep, manual immunoassays, and routine reagent aliquoting. Natural-tinted walls allow clear visual inspection of pellets, precipitates, and color reactions at the bench.
Technical Specifications
| Product Type | Round Bottom Test Tubes |
| Volume/Size | 5.0 mL, 12 x 75 mm |
| Material | Polystyrene (PS) |
| Color | Natural |
| Sterility | Non-Sterile |
| Pack Size | 1000/Bag |
| Country of Origin | USA |
Applications
- Flow cytometry sample loading and staining workflows
- Manual ELISA and immunoassay reagent handling
- Serial dilution and titration series at the bench
- Sample collection and short-term aliquot storage
- Hematology and clinical chemistry reagent transfer
- General-purpose tube for educational and research labs
Quality & Procurement
Purchase with confidence from labsupplies.com, an authorized Caplugs® Evergreen dealer shipping from US inventory. Each bag carries lot numbers to support traceability for CAP-, CLIA-, and ISO 15189-accredited laboratories. These tubes are Made in USA, and institutional and grant-funded tiered pricing is available on request.
Frequently Asked Questions
Are these 12 x 75 mm tubes compatible with flow cytometers?
The 12 x 75 mm round bottom format is the industry-standard footprint for most flow cytometry sample loaders. Verify your specific instrument's tube holder dimensions before use, as we do not certify named instrument compatibility.
Are these test tubes sterile?
No. These tubes are supplied non-sterile, which suits routine reagent handling, dilutions, and general bench work. For applications requiring sterility, the tubes should be autoclaved only if compatible — note polystyrene is not autoclavable.
Can polystyrene tubes be autoclaved?
Polystyrene is not suitable for autoclaving and will deform under standard steam sterilization temperatures. Choose these tubes for ambient and refrigerated workflows; select a polypropylene tube if heat sterilization is required.
How many tubes come in a pack and is bulk pricing offered?
Each pack contains 1000 tubes per bag. Institutional and grant-funded tiered pricing is available for higher volumes — contact labsupplies.com for a quote.