Hub BearingAll products of Hub Bearing OD:42mm ID:30mm H:7mm (Ceramic) » Previous Model No EMA-JC6806-2RS Catalogue Ceramic Bearing Kits Key Features Bearing specification:Inside diameter:30mm - Outside diameter:42mm - Width:7mm (JC6806-2RS)Equipped with TRiPEAK bearing - race proven performance.Low noise. High speed. High temperature resistance.Both sides of the detachable single lip contact seal prevent contamination and maintain lubrication in the manufacturing process. Made inTAIWAN