- Inner wall of the tube is coated with spray-dried lithium, sodium, or ammonium heparin. These additives are anti-coagulants, which activate anti-thrombins, thus blocking the coagulation cascade of the blood specimen
- Label = Paper
- LH Lithium Heparin = green cap + black ring
- NH Sodium Heparin = green cap + green ring
Greiner Bio-One (Medique)
