we are the manufacturer of vacumme blood collection tub. we have Glass tubes and Plastic tubes, our tubes have CE and ISO certification, wehave Palin tubes, Gel tubes, ESR tubes etc. seven type. and the mainly capacity is 3ml, 5ml, 7ml, 10ml. we also manufacture collection needles, and the needle size is 20G,21G,22G. A type: blood-collection needle, barrel and plunger B1 type: blood-collection needle, piston puncture needle, sleeve barrel and protective cap B2 type: intravenous infusion needle, piston puncture needle and protective cap if you have interesting,please connect with me.