AMBER COLORED TO PRESERVE-THE INTEGRITY OF SERUM FOR BILIRUBIN TESTING; CONTAINS SILICA PARTICLES TO ACCELERATE CLOTTING AND AN INERT GEL WHICH FORMS A BARRIER BETWEEN SERUM AND CELLS WHEN TUBE IS CENTRIFUGED; BUILT IN FLOW COLLECTOR; USED IN LABORATORY PROCEDURES REQUIRING SERUM; UNIT PKG QTY C/O 10 BAGS X 25 TUBES