6408-2RS Sealed Ball Bearing 40mm x 110mm x 27mm One Bearing 6408-2RS Sealed Ball Bearing, the inner diameter is 40mm, the outer diameter is 110mm and the width is 27mm, 6408-2RS is a popular size that could be used in many applications, 6408-2RS Bearing is made of Chrome Steel,bearing has 2 Rubber Seals to protect the bearing from dust or any possible contamination,6408-2RS bearing is pre-lubricated with grease.