1. Medical grade raw materials , non-toxic, non-pyrogenic, single use only. 2. Luer Lock adapter. 3. transparent barrel and colorfulplunger , other custom colors are available . 4. Custom printing is available with indelible ink. 5. The plunger fits the inside of barrel very well to allow for free and smooth movement. 6. Material for barrel and plunger: Medical grade PP(polypropylene). Gamma / steam sterilization compatiable 7. Available size: 1mL, 3mL, 5mL, 10mL, 10. Standard: ISO7886-1 , BP , USP