Inline Skate/Rollerblade/Hockey Bearings Set of 16 Bearings S608-2RS Stainless Steel, Nylon Cage Set of 16 free spin Stainless Steel sealed Inline Skate Ball Bearings with Nylon cage, the dimensions are 8mm x 22mm x 7mm. 8x22x7 mm S608-2RS Bearings are made of Grade 440C Stainless Steel,each bearing is sealed with rubber seals to protect the bearing from dust or any possible contamination.