SR6-2RS Stainless Steel Sealed ABEC-5 Ball Bearing, Bearing inner diameter is 3/8" inch, Bearing outer diameter is 7/8" inch and Bearing width is 9/32" inch, bearing is made of Stainless Steel and Stainless steel cage, SR6-2RS bearing is closed with rubber seals to protect the bearing from dust or any possible contamination, bearing is sealed and self lubricated, SR6-2RS bearing is lubricated with grease.