6208-2RSNR Ball Bearing 40mm x 80mm x 18mm One Bearing 6208-2RSNR Ball Bearings with Snap Ring, the inner diameter is 40mm, outer diameter is 80mm and the width is 18mm, bearing has 2 Rubber Seals to protect the bearing from dust or any possible contamination, also bearing is pre-lubricated with grease.