... material do you use? A: Cold & hot rolled Steel, Stainless steel, Galvanized steel, Aluminum alloy, Brass, Copper, Titanium, Iron, Nylon, or according ... passivation, brush, sandblasting, etc.Q5.How do you ensure quality control? A: We inspect every process based on your ... the mould until customer satisfied. 5). Strict QC and high quality. 6). Highly skilled manufacturing process 7). A broad variety ...