Wire drawing die,nib PCD, CD, ND or tungsten carbide,standard size for copper, steel, Al, carbon wire drawing. 1.We supply with PCD, CD, ND and tungsten carbide drawing die with polish surface and steady performance. 2.We have standard size for drawing different materials use, such as: copper, steel, Al, carbon, etc., according to your request.3,Wire shape can be round, square, spiral or some ...