... diamond and CBN related superhard material products and we have high reputation in the industry based on Zhengzhou, Henan province. ... wire, Electromagnetic wire, plated silver wire, stainless steel wire, alloy wire.size rangetolerancecasing ref.sizeinchmmmmmm≤0.0008≤0.0200.0006 ... stainless steel wire, copper plated steel wire, tungsten wire etc. high grade ND (natural diamond) wire drawing die