15 mL Tube Racks, Screw Caps, PPC, Green, BD/Falcon Compatible — 222-2449-G5K | 25/Bag | Caplugs® Evergreen

Quick Reference

Technical Narrative

The Caplugs® Evergreen 222-2449-G5K is a 15 mL Sterile Conical Centrifuge Tube with Green Cap in PS (Natural), 25/Bag Unassembled. The green cap is the industry-standard color convention for 15 mL conical tubes, established by the Falcon/BD format used across cell biology and clinical labs worldwide. The sterile specification distinguishes this tube from the non-sterile 220-series conicals — required when the tube will directly contact cells in culture, receive a sterile specimen, or feed a downstream sterile process. The 25/Bag Unassembled format provides tube and cap in the same bag for bench assembly before use — the cost-effective format for labs that assemble at point of use.

PS provides optical clarity for direct visual reading of cell pellet, turbidity, and gradient interface through the tube wall, and low autofluorescence for fluorescence-based tube-format assays. BPA-free, phthalate-free, FDA-compliant,

Procurement economics: $189.98/Bag (25/Bag), $7.5990/tube. Siblings: 222-2448-G50 (15 mL PS Green Cap 50/Tray Assembled); 222-2469-G80 (15 mL PPC Green Cap 50/Tray Assembled); 222-2470-G8K (15 mL PPC Green Cap 25/Bag Unassembled). LabSupplies.com ships from USA inventory, typically same business day.

Technical Specifications

15 mL Sterile PS Conical Centrifuge Tube (Green Cap) Applications

The is compatible with the following centrifuge platforms and sterile laboratory workflows.

Chemical Resistance — Polystyrene (PS)

Compatibility reference for PS at typical laboratory conditions.

Clinical & Research Laboratory Applications

Caplugs® Evergreen 15 mL sterile PS conical centrifuge tubes with green caps serve cell biology, immunology, clinical diagnostics, and cell therapy laboratories requiring sterile 15 mL conical tubes in the green-cap convention format. The sterile specification is required for direct cell culture contact — suspension culture harvest, lymphocyte isolation, PBMC culture, and T-cell expansion workflows where the conical tube is used as both the centrifuge vessel and the culture vessel. Clinical labs use sterile 15 mL conicals for primary specimen collection and processing — serum separation, urine concentration by centrifugation, and CSF cytospin preparation. The green cap color convention provides immediate visual tube identification in the BSC when 15 mL and 50 mL (blue cap) tubes are used simultaneously in the same workflow. The 25/Bag Unassembled format provides cost-effective bulk supply for standard labs that assemble tubes at the bench.

U.S. Manufacturing, Quality & Institutional Procurement

Caplugs® Evergreen products are manufactured in the United States under ISO 9001 quality management from FDA-compliant, food-contact-grade resins. BPA-free, phthalate-free, and latex-free, with material-disclosure documentation supporting CAP, CLIA, and ISO 15189 laboratory accreditation audits.

LabSupplies.com is an authorized dealer for the full Caplugs Evergreen catalog and ships directly from USA inventory — typically same business day for stocking SKUs. We offer below retail pricing on volume orders, tiered institutional and academic pricing, and direct support for grant-funded laboratories and government procurement channels. Lab managers and procurement officers can request a written quote or speak with a product specialist directly from our sales engineering team.

Frequently Asked Questions

Are the conical tubes sterile?

Yes. Sterile — packed in sterile tray or sterile bag as specified.

Why do 15 mL conical tubes have green caps?

Green caps on 15 mL conical centrifuge tubes are an industry-standard color convention — established by Falcon/BD and adopted across the laboratory plastics industry — to allow immediate visual identification of 15 mL tubes versus 50 mL tubes (which use blue caps) when both sizes are used simultaneously in a cell culture or serology workflow.

What is the difference between the 50/Tray Assembled (222-2448-G50) and 25/Bag Unassembled formats?

50/Tray Assembled: tubes pre-assembled with green caps, presented in an open sterile rack tray for direct pick-and-use without assembly — preferred for high-throughput BSC workflows where rapid sequential tube access is needed. 25/Bag Unassembled: tubes and caps packed in the same sterile bag, assembled at the bench before use — lower per-tube cost for labs where assembly step is acceptable.