... the vibration has achieved Z1,Z2,Z3 stainless steel with unique using performance, can resist acid ... C~350°C.all kinds of ball bearing with material of Stainless Steel, such asAISI304, AISI316, AISI440B ... , AISI440C.The type of bearing inclused: deep groove ball bearing, angular contact ball bearing, thrust ball bearing...Stainless steel ...