Sheet Metal Stamping Case: 1.Material:aluminum, zinc alloy etc 2.ISO9001:2008 ... alloy, aluminum alloy, iron metal and etc.3. Process Technics: Stamping, Punching, Polishing, Color-plated Zinc, Other technics available: CNC cutting ... to sell this product.www.jielimetal.com.cn Sheet Metal Stamping Case JL-STP-004