1-1/4" Bore; 2 Bolt Support Block; 1-1/8" Overall Length; 4" Overall Width; 3" Overall Height; 1-3/4" Base to Center of Shaft; 3" Bolt Center Across Shaft; 0.34" Mounting Hole Diameter; Malleable Iron

1" Bore; 2 Bolt Support Block; 1" Overall Length; 3-1/4" Overall Width; 2.56" Overall Height; 1-1/2" Base to Center of Shaft; 2-1/2" Bolt Center Across Shaft; 0.28" Mounting Hole Diameter; Malleable Iron

3/4" Bore; 2 Bolt Support Block; 3/4" Overall Length; 2-3/4" Overall Width; 2.13" Overall Height; 1-1/4" Base to Center of Shaft; 2" Bolt Center Across Shaft; 0.22" Mounting Hole Diameter; Malleable Iron

20MM Bore; 2 Bolt Support Block; 20MM Overall Length; 60MM Overall Width; 50MM Overall Height; 30MM Base to Center of Shaft; 45MM Bolt Center Across Shaft; 5.5MM Mounting Hole Diameter; Malleable Iron

16MM Bore; 2 Bolt Support Block; 24MM Overall Length; 53MM Overall Width; 43MM Overall Height; 25MM Base to Center of Shaft; 38MM Bolt Center Across Shaft; 6.6MM Mounting Hole Diameter; Aluminum