Metal stamping cap for lock 1. Metal stamping cap with different material such as: Stainless steel, Alu., copper etc..2. Size: Dia.: 17mm ... client. Xiamen Boming Industrial & Trading Co.,LtdItem name:Metal cap for lock accessoriesItem NO.:BM-S18Surface:chromed, zinc plaing, painting ... The usage of material involves many types, such as Stainless steel, Aluminum, Brass, Bronze. SGCC, SECC, and SPCC, etc ...