Caulking Gun , 1. Material;carbon steel ; 2. Spec;350gms/pc,430gms/pc,300gms/pc ; 3. CNTS;36 pcs . Caulking Gun ,1. Material:carbon steel ;2. Spec:350gms/pc,430gms/pc,300gms/pc ;3. CNTS:36 pcs ;4. Each piece in polybag ; best quality and competitive price . Carbon Steel Caulking Gun (SX-FX-911)