Caplugs® Evergreen 4.5 mL Conical Bottom Test Tubes, 12 x 75 mm, Polystyrene (PS), Red, 250/Bag

The Caplugs® Evergreen 4.5 mL Conical Bottom Test Tubes deliver clear, rigid polystyrene construction in a standard 12 x 75 mm format for routine bench work. Lab teams rely on these red-tinted tubes for sample aliquoting, flow cytometry prep, and small-volume reagent handling where the conical base aids cell pelleting and complete recovery.

Technical Specifications

Applications

• Flow cytometry sample preparation and staining workflows
• Cell pelleting where the conical base improves recovery
• Small-volume serum, plasma, and reagent aliquoting
• Color-coded sample sorting and rack organization using the red tint
• Routine clinical and research bench transfers
• Short-term sample storage at ambient or refrigerated temperatures

Quality & Procurement

labsupplies.com is an authorized Caplugs® Evergreen dealer shipping from US inventory, and these tubes are Made in USA. Each bag carries a lot number to support traceability for CAP-, CLIA-, and ISO 15189-accredited laboratories. Institutional and grant-funded tiered pricing is available — contact our procurement team for volume quotes.

Frequently Asked Questions

Are these test tubes sterile?

No. These 4.5 mL polystyrene tubes ship non-sterile, making them well suited for general bench tasks, sample prep, and applications that do not require pre-sterilized labware.

What are the dimensions and capacity?

Each tube measures 12 x 75 mm with a 4.5 mL working capacity, matching the standard format used across most 12 mm tube racks and flow cytometry instruments.

Do these tubes include caps?

This listing covers the tubes only; no closures are included in the spec. Caps and stoppers sized for 12 mm tubes can be ordered separately to match your workflow.

How many tubes come per pack?

Tubes are supplied 250 per Bag. The listed price reflects one bag of 250 conical bottom polystyrene tubes.