The VACUETTE® TUBE 6 ml CAT Serum Clot Activator, featuring a 13x100 red cap-black ring, non-ridged design, is essential for precise and sterile serum collection. This sterile tube, available in inner packs of 50 and a sales unit of 1200. The CAT Serum Clot Activator within ensures rapid and reliable clotting, making it ideal for various laboratory applications.