Sprag Cage FWC Series is sprag cage,the roller is BY sprag, torque is higher Sprag Cage FWC Series is a sprag type freewheel cage, selected BY sprag and new construction. This type provides higher torque and lover noise while fixed convenient. Its model and construction is followed for, if you need special one, please contact us.TypeInner diameterOuter diameterWminTknNmSprag spaceSprag typeSprag ...