S6802-2RS Sealed Ball Bearing Premium ABEC-5 Quality with Si3N4 Ceramic Balls (Silicon Nitride) 15mm x 24mm x 5mm S6802-2RS Bearing, categorized as thick section, double sealed, radial and deep groove ball bearings,S6802-2RS bearing is made of Stainless Steel with Ceramic Balls (Si3N4) and Stainless steel cage,S6802-2RS bearing is closed with rubber seals to protect the bearing from dust or any possible contamination,S6802-2RS bearing is sealed and self lubricated,the quality is set to EMQ (Premium ABEC-5 quality) to ensure high speed,S6802-2RS bearing is lubricated with grease.