Chevy Accessory Vee Groove Pulley with 1/2" center hole for crank bolt.
It can be stack with additional BDS Vee Groove Pulleys and BDS drive spacers.
The vee pulley is .700" wide with a diameter of 6.25". It's made with billet 6061 aluminum.
This part is used in all BDS' Chevy Blower & Drive Kits