6018-2RS Sealed Ball Bearing 90mm x 140mm x 24mm 6018-2RS Sealed Ball Bearing, 6018-2RS bearings is made of Chrome Steel, 6018-2RS bearing has 2 Rubber Seals to protect the bearing from dust or any possible contamination, 6018-2RS is self lubricated bearings (bearings are already greased).

Deep Groove ball bearings having an outside diameter => 9 mm and a bore diameter . 10 mm are known as Extra-small ball bearings. Standard ball retainers (cages) are made from pressed steel