... 7000 square meters.2. Certificate: ISO9001:2008, RoHS.3. Material: stainless steel, iron (SPCC, SECC, SPTE, tinplate), aluminum alloy, red copper, brass ... available.4. Process: stamping, deep drawing, welding, Bending, sheet metal fabrication, and metal assembly. etc.5. Surface treatment: nickel plating, zinc ...