"High speed ceramic ball bearings Models: 672~6709682~6820692~6920602~6020623~6220633~632016000MR52-MR149,R,FR,MR,MFR Features:1.High speed bearings:12000rpm--75000rpm2.High temperature-resistant bearing:100??C--800??C.It can been applied in kiln,plastic,steel and other equipments that can bear high temperature3.Corrosion-resistant bearings4.Electric-insulated bearings5.Vacuum bearings:self-lubrica" . . . .