Application: The Safety Anesthetic Syringe is a new product usedfor injecting anesthetic and prevent needlestick injury in varioussurgeries. Features: 1. Ingenious designed protectivedevice for preventing needle stick injury. 2. The polymersyringe barrel is single use for preventing infection byreuse. 3. Convenient to observe the anesthetic throughtransparent material. 4. Skillful design for installinganesthetic ampoule and needle conveniently. 5. Both 1.8ml and2.2ml ampoules can be used. The plastic barrel is for singleuse. The metal syringe can be reused. Instructions foruse: 1. Put an anesthetic ampoule into the innerbarrel. 2. Withdraw the plunger and screw the barrel on thesyringe metal handle. 3. Screw a needle on the tip of thebarrel by turning clockwise. 4. Push plunger to injectanesthetic to the patient. 5. After injection, push the outerbarrel forward until locked with the inner barrel by click. Theneedle is protected inside of the outer barrel. 6. Unscrew thebarrel from the syringe handle and then discard the barrel.