Disposable Surgical Blade/Scalpel Specifications 10#, 11#, 12#, 13#, 14#, 15#, 18# 20#, 21#, 22#, 23#, 24#, 25# Sterile surgical blade/Scalpel: 1. Material: Carbon steel and stainless steel are for different choices; 2. Sterility: Sterilized by Gamma irradiation. 5 years of sterility valid if properly stocked and package is not Open; 3. Safety: Single use blade. Reuse of a blade is strictly prohibited in any case unless collected for second Steel production. 4. CE certified quality blade and produced by first auto-grinding machines in China. 5. Stable high quality is promised