Engine Pulley Height: 5 3/8 ", 1" ID stepped down to 3/4", Small Pulley OD: 3 1/2", Large Pulley OD: 5 1/2", Made By: An OEM supplier, 3 5/8" distance between pulleys, Keyway: 1/4 ". Replaces Part Numbers: AYP 140186, Husqvarna 532140186. Stens Part Number: 275-100