These pulleys are machined from billet aluminum and hard coated for added life. The pump pulleys fit all pumps with 5/8" diameter shafts and 3/16" keys. The crank pulley fits all arbors with 1" diameter shafts and 1/8" keys. These pulleys are 1.06 wide and are also available 1/2" wide.
These Coated Pulleys are used by some of the top Named Engine Builders and Give Very Dependable Service. You cannot go wrong here.