Flat Idler Pulley SKU: B1SB7182 Please log in to see price or purchase this item DetailsO.D 4-3/4" (120.65mm); I.D 3/8" (9.52mm); Height 1-3/8" (34.93mm)DetailsHusqvarna 601-00 03-91, Noma 310326Cross Referencepul3993Cross Reference280-402