BD Vacutainer EDTA Blood Collection Tubes 10 mL with Hemogard Closure 16mm x 100 mm, 100/boxBD 366643 Vacutainer EDTA 10 mL Tubes are plastic sample tubes for collecting whole blood. These collection tubes are coated on the inside with K2EDTA (Potassium Ethylene Diamine Tetra Acetic acid). This material acts as an anticoagulant to prevent the samples from clotting. These blood collection tubes also use the Hemogard closure. The Hemogard is designed to protect lab personnel, equipment, and other samples from coming into direct contact with