Lithium Heparin Blood Collection Tubes are intended for use in special chemistry tests that require heparinized plasma or whole blood for analysis. These tubes are made from transparent PET or glass, with caps produced from polyethylene or optionally rubber, depending on customer preference. Each vacuum tube features a green color-coded safety cap with a rubber piston for secure sealing and contains lithium heparin as the anticoagulant. The tubes are available in both sterile (gamma-irradiated) and non-sterile versions and come in various sizes to suit different laboratory applications.