... :1.0mm-73.5mm Grade:G10-G25 Surface:Mirror face Tungsten carbide ball YG6 is consisted of WC-CO ,WC:94%,CO ... .Usage:Bearings,punching,grinding other media and so on.Character:High precision and good ware-resistant.PACKING:100 pcs per bag ... box,18 boxes per carton,1 carton per wooden case. Tungsten carbide ball YG6