The syringe will autodestory for signle use. Material: Barrel-made of medical, transparent polypropylene Plunger--- made of medical polypropylene. Standard piston--made of natural rubber with two retaining rings. Latex free piston--made of synthetic non cytotoxic rubber, free from the protein of the natural latex to avoid possible allergy. According to the ISO9001. Needle protector--made of medical grade transparent PVC or PE. Lubricant--silicone oil, medical grade Graduation-----indelible ink, Blister or plastic package: ----medical grade paper and plastic film. Specification: 1. Sterile, single use, non-toxic, pyrogen-free. 2. The barrel is transparent enough to help the user observe the mixture and liquid flow easily. 3. The indelible graduation makes the reading easy. 4. The distance between finger grips and barrel is according to the ISO standards, it can guarantee an easy grip. 5. Luer slip or luer lock nozzle permits to adapt the needle hub. 6. Sterilized by ethylene oxide gas(eog), according to en550 standard. Product Feature After injectin, when you push the plunger, its tip will be locked in the nozzle. Then when you pull it back, tip will broken into nozzle. So it cannot be used for injetion.