FD211RM , FD211-1 1/2SQ, DHU1-1/2S-211 DISC HARROW UNITBCA/FEDERAL MOGUL: FD211RMPEER BEARING: FD211-1 1/2SQFAFNIR/TORRINGTON: DHU1-1/2S-211DIMENSIONS:BORE: 1-1/2" SquareBOLT TO BOLT: 5.5" (BOTTOM LEFT TO TOP RIGHT)