... nickel silver, copper-nickel-zinc alloy, stainless steel, tinplate, etc. It depends on your requirement. 5). Surface coating: zinc, silver, copper, black oxide ... heavy element for our product per batch to you depend on your requirement. 7). Very thing is negotiable, we stick ... CAD, Pro/E, 2D, 3DMOQ3000 Pcs, the quantity depends on your product We can design and fabricate complex precision tooling, and ...