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

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

3/8" Bore; 2 Bolt Support Block; 0.56" Overall Length; 1.62" Overall Width; 1" Overall Height; 9/16" Base to Center of Shaft; 1-1/4" Bolt Center Across Shaft; 0.16" Mounting Hole Diameter; Aluminum

1/4" Bore; 2 Bolt Support Block; 1/2" Overall Length; 1-1/2" Overall Width; 0.89" Overall Height; 1/2" Base to Center of Shaft; 1.12" Bolt Center Across Shaft; 0.16" Mounting Hole Diameter; Aluminum

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