Heparin Blood Collection Tubes are designed for collecting blood samples from patients receiving anticoagulant therapy. The heparin anticoagulant activates antithrombin, inhibiting the coagulation cascade and yielding whole blood or plasma samples suitable for analysis. These tubes are made from transparent PET or glass, with caps manufactured from polyethylene or optionally rubber as per customer requirements. Each tube features a light green color-coded safety cap with a rubber piston for secure sealing and is available in both sterile (gamma-irradiated) and non-sterile versions in various sizes to meet different laboratory applications.