Specification: 0.5ml, 1ml, 2ml, 3ml, 5ml, 10ml Needle:Fixed Needle Material: Made of medical grade pp Sterile: By EO gas, Non-Toxic, Non-Pyrogenic Certificate: CE and ISO13485 International patent protection Advantage: Single use safety with one handed operation; Fully auto retraction after medication is discharged; Non-exposure of needle after automatic retraction; Requires minimum training; Fixed needle, no dead space; Reduce disposal size and cost of waster disposal