Features: * For A belts pulleys from 2 in. to 12 in. have keyways except 3/8 in. and 1/2 in. bores and 3/4 in. bores in pulleys less than 4 inches in diameter * All pulleys are with slotted headless set screws * In Sta-Pak cartons * For 4L or 1/2 in. x 11/32 in. belts * Die cast * 5/8 inch bore * 12 inch outer diameter * Pitch diameter: 11.75 inches * Number of spokes: 6 What"s In The Box: * Chicago Die Casting 1200A 12-Inch X 5/8-Inch Single V-Groove Pulley A Section