1614-2RS Sealed Ball Bearing 3/8" x 1 1/8" x 3/8" inch One Ball Bearing 1614-2RS Sealed Ball Bearing, Bearing inner diameter is 3/8", Bearing outer diameter is 1 1/8 and Bearing width is 3/8, Bearing is made of Chrome Steel, each bearing has built-in seals to protect the bearing from dust or any possible contamination.