Material:Stainless steel,Ti-Au plated stainless steel,Copper alliy,Copper alloy Cr plated copper alloy(light,matter),AL alloy Product characteristicSuper thin,pure flat,arc,large dial piece design that is the pioneer in the wordChina newest fifth generation stainless steel productThree national patents,which show more technical advantagePioneering ultrathin one-bit functional unitUniversalizable ...