Hub BearingAll products of Hub Bearing OD:21mm ID:12mm H:5mm (Ceramic) » PreviousNext » Model No EMA-JC6801-2RS Catalogue Ceramic Bearing Kits Key Features Bearing specification:Inside diameter:12mm - Outside diameter:21mm - Width:5mm (JC6801-2RS)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