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; Aluminum

1-1/2" Bore; 2 Bolt Support Block; 1-1/4" Overall Length; 4-3/8" Overall Width; 3-7/16" Overall Height; 2" Base to Center of Shaft; 3-1/2" Bolt Center Across Shaft; 0.346" Mounting Hole Diameter; Aluminum

1-1/4" Bore; 2 Bolt Support Block; 1-1/8" Overall Length; 3-3/4" Overall Width; 3" Overall Height; 1-3/4" Base to Center of Shaft; 3" Bolt Center Across Shaft; 0.346" Mounting Hole Diameter; Aluminum

1" Bore; 2 Bolt Support Block; 1" Overall Length; 3-1/16" Overall Width; 2-1/2" Overall Height; 1-1/2" Base to Center of Shaft; 2-1/2" Bolt Center Across Shaft; 9/32" Mounting Hole Diameter; Aluminum

2" Bore; 2 Bolt Support Block; 1-1/2" Overall Length; 5-1/2" Overall Width; 4-3/8" Overall Height; 2-1/2" Base to Center of Shaft; 4-1/2" Bolt Center Across Shaft; 13/32" Mounting Hole Diameter; Aluminum