bood collection tube(ESR Tube) Color: black Additive: 3.8%Sodium Citrate Tube sizeMaterialDraw VolumeQTY/CTNCarton Size13*75mmPET/Glass1.6,2.4,4ml1200pcs37*31.5*28cm8*120mmPET/Glass1.28,1.6ml1200pcs46*37*28cm Max. vacuum degree tolerance:±10% Invert the tube for 6-8 times gently. Product Feature Our high-quality tubes are featured with Safety, Accuracy, Convenience and Quickness. Save your time, improve your efficiency. Application They are used together with blood collection needle for blood collecting in clinic and test in lab. We also can supply other blood collection tubes for you: 1)No additive tube, with no additive, red stopper 2)Pro-coagulation tube, with Clot Activator, red or orange stopper. 3)EDTA tube with K3EDTA or K2EDTA, lavender stopper. 4)Glucose tube with Sodium Fluoride & Sodium Heparin, grey stopper. 5)PT tube(1:9) with 3.8% or 3.2% sodium citrate, blue stopper. 6)Heparin tube with Sodium Heparin or Lithium heparin, green stopper. 7)ESR tube(1:4) with 3.8% Sodium citrate, black stopper. 8)Gel&clot activator tube, with Gel & Clot Activator, yellow stopper. If you are interested ,pls feel free to contact us.