polished tungsten rods surface: black and polished Purity:99.95%(min),Density: ... polished/ground Tungsten rods:Usage: Manufacture tungsten wire, frame of grid, elicit wire, bracket, mould rods in high temperature, eradiate cathode, electrodes, bracket ... : ASTMplease let us know the diameter, length and surface of tungsten rod you need.We can manufacture according to your requests ...