Greiner Bio-One - VACUETTE® Z Serum Clot Activator Venous Blood Collection Tube Clot Activator Additive 9 mL Pull Cap Polyethylene Terephthalate (PET) Tube [1/EA]

The inner wall of the serum tube is specially coated with microscopic silica particles, which activate the coagulation process. Serum separator tubes contain a separation gel in the base of the tube; during centrifugation, this gel forms a stable barrier between the serum and the blood cells. Nonridged pull cap is color-coded red with a black ring.