Also known as Serum separating tubes Gel separates the serum and the blood clot during centrifugation of the GEL-SST Advance tubes, preventing the serum from being affected by the separated cellular components. Material: PET & PP Type of Additive: Silicone Gel & clot activator Size: 13X75 mm, 13X100mm Capacity: 3.5mL, 4mL, 5mL, 6mL Available in: Vacuum and Non-Vacuum Colour Code: Yellow Available Packaging: Inner Packaging 100 pieces, Outer Carton Packaging 1200 pieces Used for: Endocrinology, Toxicology, Microbiology, Immunology & urea test C reactive protein test * Serum Separation Tubes should be gently inverted 180 and back 6-8 times