S608-2RS Stainless Steel Ball Bearing 8mm x 22mm x 7mm Nylon Cage one Stainless Steel skate ball bearing with Nylon cage, 8x22x7 mm S608-2RS is a popular size that could be used in many applications that uses this size 8mm x 22mm x 7mm like skate sports. S608-2RS Bearing is made of grade 440C Stainless Steel,bearing has built-in rubber seals to protect the bearing from dust or any possible contamination.