BD Vacutainer PST Blood Collection Tubes 3 mL 13mm x 75mm, 100/boxBD 367960 Vacutainer PST Blood Collection Tubes 3 mL 13mm x 75mm, 100 box. BD Vacutainer PST Tubes contain spray coated lithium heparin and a gel for plasma separation. BD Vacutainer PST Lithium Heparin Tubes eliminate the need to wait for a clot to form, making it an ideal tube for STAT procedures, as well as for patients receiving anticoagulant therapy. The BD Vacutainer PST Tube still provides the convenience of gel separation with the added