Vacuum blood collection tubes are widely used in hospitals, blood stations, testing institutions, disease control centers and other fields. According to the function and color of the head cover, vacuum blood collection tubes can be divided into ordinary serum tubes (red), fast serum tubes (orange-red), inert separation gel coagulation tubes (golden yellow), and EDTA anticoagulation tubes (purple) , sodium citrate coagulation test tube (light blue), heparin anticoagulation tube (green), plasma separation tube (light green), potassium oxalate/sodium fluoride tube (gray), sodium citrate erythrocyte sedimentation test tube (black) and 9 products.