Caplugs® Evergreen 4.5 mL Conical Bottom Test Tubes, 12 x 75 mm, Polystyrene, Natural, 250/Bag
These 4.5 mL conical bottom test tubes are molded from clear natural polystyrene in a standard 12 x 75 mm format, giving bench scientists optical clarity for visual reads and a tapered base that consolidates small pellets. Ideal for sample aliquoting, flow cytometry prep, and routine clinical or research assay handling.
Technical Specifications
| Product Type | Conical Bottom Test Tubes |
| Volume/Size | 4.5 mL, 12 x 75 mm |
| Material | Polystyrene (PS) |
| Color | Natural |
| Sterility | Non-Sterile |
| Pack Size | 250/Bag |
| Case Quantity | 1000 |
| Country of Origin | USA |
Applications
- Flow cytometry sample preparation and staining
- Aliquoting reagents, standards, and patient samples
- Routine clinical and serology specimen handling
- Small-volume centrifugation where pellet recovery matters
- Immunoassay and ELISA reagent dispensing
- General benchtop mixing, dilutions, and short-term sample holding
Quality & Procurement
Purchased through labsupplies.com, an authorized Caplugs® Evergreen dealer shipping from US inventory. Each bag carries lot numbers that support traceability for CAP-, CLIA-, and ISO 15189-accredited laboratories. Manufactured in the USA. Institutional and grant-funded tiered pricing is available for volume procurement.
Frequently Asked Questions
Are these test tubes sterile?
No. These tubes ship non-sterile, which suits general benchtop, aliquoting, and many clinical workflows where sterility is not required. For sterile applications, validate your own decontamination protocol or select a sterile alternative.
What does the 12 x 75 mm dimension refer to?
It is the standard outer diameter (12 mm) by length (75 mm) format, compatible with most common 12 mm tube racks, flow cytometers, and benchtop instrumentation that accept 12 x 75 mm tubes.
What is the working volume of these tubes?
The tubes are rated at 4.5 mL. The conical bottom helps concentrate small pellets and recover low-volume samples after centrifugation.
How many tubes come per order?
Tubes are packaged 250/Bag. The listed pack reflects a case quantity of 1000 tubes for laboratory and procurement-scale ordering.