The syringe has three component parts: Barrel Plunger Rubber Seal On syringes of nominal size 1 ml, 2 ml, 5 ml e 10 ml the syringe nozzle is co-axial with the barrel and at the 20 ml syringes it is eccentric. By processing and sharpening, the tip of the cannula performs an easy penetration of the tissues, without pain feeling. 1ml with/without needle 1ml with/without needle for tuberculin 2ml with/without needle 2.5ml with/without needle 5ml with/without needle 10ml with/without needle 20ml with/without needle 40 U. I. With/without needle 40 U. I. With/without needle for insulin