SKF FY 1.3/16 TF Ball Bearing Flange Unit, 4 Bolts, Setscrew Locking, Regreasable, Contact and Flinger Seal, Cast Iron, Inch, 1-3/16" Bore, 3-1/4" Bolt Hole Spacing Width, 4390lbf Dynamic Load Capacity Cast iron flanged housing for vibration damping and structural rigidity Double-sealed, deep-groove ball bearing insert with an extended inner ring on both sides for applications with radial, thrust, and combined loads Acrylonitrile-butadiene rubber (NBR) seals keep lubricant in and contaminants out and flingers provide extra sealing protection Set screw lock for a three-point contact hold on the shaft Grease fitting on the housing for reapplying lubricant