6405-2RS Sealed Ball Bearing 25mm x 80mm x 21mm One Bearing 6405-2RS Sealed Ball Bearing, the inner diameter is 25mm, the outer diameter is 80mm and the width is 21mm, 6405-2RS is a popular size that could be used in many applications, 6405-2RS Bearing is made of Chrome Steel,bearing has 2 Rubber Seals to protect the bearing from dust or any possible contamination,6405-2RS bearing is pre-lubricated with grease.