The MRC R14FF is a single-row, inch-sized Conrad radial deep groove ball bearing manufactured by MRC (a brand of SKF). It features double metal shields (designated by the "FF") to keep lubricant in and contaminants out. Physical Specifications Bore Diameter (ID): 0.8750 inches (7/8 in) Outside Diameter (OD): 1.8750 inches (1-7/8 in) Overall Width (B): 0.5000 inches (1/2 in) Weight: 0.23 lbs.