Belt tensioner pulley for lawn tractor compatible AYP HUSQVARNA PARTNER RALLY Outer diameter (mm): 90 Inner diameter (mm): 9,5 Height (mm): 22 Weight: 164 g For models: AYP HUSQVARNA PARTNER RALLY Part No.: 31270141 Original part No.: 532 12 13-16 , 532 12 36-88 , 532 12 36-74 , 121316 , 1233674X , 123688