We can supply you with following vacuum blood collection tubes: 1) No additive tube with red stopper, no additive, applied for quick serum measurement and immunology test. (glass & plastic 12/13*75, 12/13*100, 15/16*100) 2) Pro-coagulation tube with orange stopper. Clot activator is pre-filled for quick serum measurement and immunology test. (glass & plastic 12/13*75, 12/13*100, 15/16*100) 3) Gel & clot activator tube with yellow stopper. Gel and clot activator are pre-filled for quick serum measurement and immunology test.(glass & plastic 12/13*75, 12/13*100, 15/16*100) 4) Fluoride Oxalate tube with grey stopper. Sodium fluoride and potassium oxalate/K2EDTA is added for blood glucose test (glass & plastic 12/13*75, 12/13*100) 5) PT tube (1:9) with blue stopper. 3.8% or 3.2% sodium citrate is added for blood coagulation test. (glass & plastic 12/13*75, 12/13*100) 6) Heparin tube with green stopper. Sodium or Lithium heparin is added for plasma biochemical test & hematology. (glass & plastic 12/13*75, 12/13*100) 7) EDTA tube with lavender stopper. K3EDTA or K2EDTA is pre-filled for whole blood hematology determination and blood type verification. (glass & plastic 12/13*75, 12/13*100, 13*55) 8) ESR tube(1:4) with black stopper. 3.8% Sodium citrate is added for corpuscle sedimentation test. (glass 12/13*75, 8*120mm)