Comparison : Item # F4DC-BL-050, Ball Bearing, Die-Cast Housing, Rigid Type (4 Bolt) F4DC-BL - Series
Item # F4DC-BL-062, Ball Bearing, Die-Cast Housing, Rigid Type (4 Bolt) F4DC-BL - Series
Item # F4DC-BL-075, Ball Bearing, Die-Cast Housing, Rigid Type (4 Bolt) F4DC-BL - Series
Item # F4DC-BL-100, Ball Bearing, Die-Cast Housing, Rigid Type (4 Bolt) F4DC-BL - Series


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