... or tungsten carbide,standard size for copper, steel, Al, carbon wire drawing. 1.We supply with PCD, CD, ND and tungsten ... : copper, steel, Al, carbon, etc., according to your request.3,Wire shape can be round, square, spiral or some customised irregular ... .4,OEM welcomed.Xiamen Poko Precision Die of Wolfram Steel Tool Co., Ltd is another subsidiary company of POKO Group besides ...