6206-2RS Si3N4 Ceramic Stainless Steel Ball Bearing Nylon Premium ABEC-5 30mm x 62mm x 16mm S6206-2RS is double sealed radial and deep groove ball bearing, S6206-2RS bearing is made of Stainless Steel with Ceramic Balls (Si3N4) and Nylon Cage, S6206-2RS bearing is closed with rubber seals to protect the bearing from dust or any possible contamination,S6206-2RS bearing is sealed and self lubricated,the S6206-2RS inner diameter is 30mm, the S6206-2RS outer diameter is 62mm and the S6206-2RS width is 16mm, the quality is set to EMQ (Premium ABEC-5 quality) to ensure high speed,S6206-2RS bearing is lubricated with grease.