A sodium heparin glass tube typically refers to a type of blood collection tube used in medical settings for the purpose of collecting blood samples for various tests. Sodium heparin is an anticoagulant, meaning it prevents the blood from clotting by inhibiting the activity of clotting factors.Effortless handling of sample with storage capacity of 3 mL / 4 mL / 5 mLmL facilitating accurate laboratory analyses.