608-2RS Ball Bearing 8x22x7 mm Sealed Bearings 608-2RS with Silicon Nitride Ceramic (Si3N4) Balls Set of 16 Silicon Nitride ceramic 608-2RS Bearing, categorized as regular section, double sealed, radial, deep groove ball bearings, 608-2RS bearings are made of Chrome Steel with Ceramic balls (SI3N4) and steel cage, 608-2RS bearing are closed with rubber seals to protect the bearing from dust or any possible contamination, 608-2RS bearings are sealed and self lubricated, the 608-2RS inner diameter is 8mm, the 608-2RS outer diameter is 22mm and the 608-2RS width is 7mm, the quality is set to EMQ (electric motor quality) to ensure high speeds up to 38000 revolutions per minute (RPM), 608-2RS bearings are lubricated with grease.