Color: Purple, Tube size: 13 x 100mm, 13 x 75mm Material: Glass, PET. Volume: 1ml, 2ml, 3ml, 4ml, 5ml, 6ml, 7ml. Anticoagulant status: Liquid or Powder. ED TA Tubes use ED TA(K2) and ED TA(K3) as anticoagulants. They are widely used to collect blood for clinical hematology examination and are suitable for blood cells analysis and determination of blood groups.