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

12MM Bore; 2 Bolt Support Block; 20MM Overall Length; 43MM Overall Width; 36MM Overall Height; 20MM Base to Center of Shaft; 30MM Bolt Center Across Shaft; 5.3MM Mounting Hole Diameter; Aluminum

8MM Bore; 2 Bolt Support Block; 18MM Overall Length; 32MM Overall Width; 28MM Overall Height; 15MM Base to Center of Shaft; 22MM Bolt Center Across Shaft; 3.5MM Mounting Hole Diameter; Aluminum

20MM Bore; 2 Bolt Support Block; 30MM Overall Length; 60MM Overall Width; 51MM Overall Height; 30MM Base to Center of Shaft; 42MM Bolt Center Across Shaft; 8.4MM Mounting Hole Diameter; Aluminum