Lawn tractor belt tensioner pulley compatible AYP HUSQVARNA PARTNER RALLY Outer diameter (mm): 76,2 Inner diameter (mm): 9,5 Height (mm): 28,6 Weight: 173 g For models: AYP HUSQVARNA PARTNER RALLY Part No.: 31270024 Original part No.: 532 13 91-23 , 139123 P