DOP30-044 BRIGGS & STRATTON air filter fits 7 thru 18 HP horizontal engines 170400, 190400, 195400, 233400, 243400, 300400, 320400, 325400, and 326400 series engines. Size: 4-1/4" OD x 2" ID x 3-13/16" H. Use with our DOP30-920 pre-filter. Replaces # 393957, 393957S, 390930, and Ariens # 24519.