Engine Pulley / MTD 753-0635Pack Size:1MTD 753-0635, MTD 756-0488Foley/Belsaw 5979907, NHC 276-0925, Oregon 44-366, Rotary 10185, Stens 275-780, Sunbelt MT-28, Sunbelt B1MT28MTD 640-690, 750-790 and 137-531-000 thru 137-631-000; 30" and 38" decks 3" space between pulleys, Height: 5 1/2 ", Keyway: 1/4 ", Large Pulley OD: 5 1/2", Small Pulley OD: 3 9/16", 1 1/4" x 1" ID step pulley