Our Gel and Clot Activator Tube are useful in Clinical biochemistry serum test serology and immunology test. It is effective in separating serum from fibrin & cells which helps retain the original form of the blood. Specifications: Additive: Gel & clot activatorSerum specs: 13x75mm, 13x100mm, 16x100mmDraw volume: 2-9ml maxVacuum degree tolerance: +-10% Invert the tube for 6-8 times gently centrifuge for 10 minutes at 3000-3500 rpm after 15-30 minutes complete coagulationCap color: Yellow