Ball Bearings 6001-2RS 12 x 28 x 8 mm One Bearing 6001-2RS Ball Bearings, 6001-2RS inner diameter is 12mm, 6001-2RS Bearings outer diameter is 28mm and Bearings 6001-2RS width is 8mm, Ball Bearing 6001-2RS is a popular size that could be used in many applications, 6001-2RS Ball Bearings are made of Chrome Steel and can rotate up to 12,000 rpm, each 6001-2RS bearing has 2 Rubber Seals to protect the bearing from dust or any possible contamination, the 6001-2RS bearings are pre-lubricated with grease.