Air Filter / Briggs & Stratton 399968Pack Size:1Briggs & Stratton 399968NHC 261-0485Briggs & Stratton 170401, 170402, 170403, 170407, 170412, 170417, 170431 and 170432Length: 8 5/8 ", Height: 2 7/16 ", Width: 3 1/16 "