6804-2RS ABEC-3 Ball Bearing Stainless Steel and Ceramic Balls 20mm x 32mm x 7mm 6804-2RS ABEC-3 Stainless Steel with Ceramic Balls Ball Bearing, each 6804 bearings is closed with 2 Rubber Seals, double sealed and one seal from each side to protect the bearing from dust or any possible contamination, also bearing is pre-lubricated with grease, Bearing 6804 has industrial packaging.