S6202ZZ Shielded Ball Bearing Premium ABEC-5 Quality with Si3N4 Ceramic Balls (Silicon Nitride) 15mm x 35mm x 11mm S6202ZZ is Double Metal Shields, radial, deep groove ball bearing, S6202ZZ bearing is made of Stainless Steel with Ceramic Balls (Si3N4), S6202ZZ bearing is closed with 2 Metal Shields, one Shield from each side to protect the bearing from dust or any possible contamination, S6202ZZ bearing is sealed and self lubricated, the quality is set to EMQ (Premium ABEC-5 quality) to ensure high speed, S6202ZZ bearing is lubricated with grease.