... :G10-G25 Surface:Mirror face Tungsten carbide ball YG6 is consisted of WC-CO ,WC:94%,CO:6%.Density:14.9+/-0.10g ... other media and so on Tungsten carbide ball YG6 is consisted of WC-CO ,WC:94%,CO:6%. Density:14.9+/-0.10g ... . Usage:Bearings,punching,grinding other media and so on YG6 Tungsten carbide ball