Air Filter - 51/55 - 503 89 81 02 SKU: HU0148 Please log in to see price or purchase this item DetailsAIR FILTER-Model: 51, 55Details4” (101mm) L x 3-1/2” (89mm) W x 2-3/4” (70mm) HDetailsHUSQVARNA 503 89 81 02