608RS Skateboard Bearings With Extended inner race 8mm x 22mm x 7mm inner race width=13mm No Need for Spacers 608RS Skateboard Bearings With Extended inner race, that will eliminate the use of spacers,you will get more rigid/smooth wheel set when you use these bearings,these bearing is sealed on one side (the outer side) with rubber seal,Bearings are made of Chrome Steel,each bearing have One Rubber Seal to protect the bearing fromdust or any possible contamination.