BD 367884 Vacutainer Lithium Heparin 4 mL Blood Collection Tubes 13mm x 75mm, 100/boxBD 367884 Vacutainer Plastic Heparin Tubes are used for plasma determinations in chemistry. The Tubes have lithium or sodium heparin spray coated at inner surface. Tube inversions allow mixing blood with the anticoagulant and prevent clotting. Evacuated blood collection tubes with heparin are used for plasma determination in chemistry Tubes are sterile Blood is drawn directly from the vein into the evacuated sterile collection tubes Only one