6905-2RS Sealed Ball Bearing 25 x 42 x 9 mm 6905-2RS Sealed Ball Bearing, inner diameter is 25mm, outer diameter is 42mm and width is 9mm, Bearing is made of Chrome Steel, 6905-2RS bearing has rubber seals to protect the bearing from dust or any possible contamination, 6905-2RS bearing is self lubricated bearing.