EC626-2RS has the same external mounting dimensions as the standard 626-2RS; EC represents the manufacturer's optimized series, with ultra-precision groove treatment and noise reduction optimization; -2RS is a double-sided NBR rubber contact seal, pre-filled with grease at the factory, and is a maintenance-free miniature bearing. Model EC626-2RS AC626-2RS Brand ZH Material Chrome Steel precision P0 P6 P5 P4 Product Description 1.2RS double-sided contact seal, dustproof and