Main structure of sterile safety syringe:RPF,barrel,plunger,piston and its barrel and piston are in interference fit,so as to make sure of seal.

RPF:RPF as well as feature of manual operation will start Spontaneously in order to prevent it from reusing.Meanwhile,it is able to prevent it from hurting people by covering hypodermic needle with barrel.

   Barrel of the sterile safty syringe is transparent to observe solution and read its measure material whose biocompatibility conforms to standards.