(Compatibility): For Briggs & Stratton 491588s 4915885 399959 push mowers, BS- 4101 5043 5043A 5043D 5043H 5043 K. Fit 3.5-6.5 HP small engine, 625 675 725 625-675 and/or old stock item. (Package includes): Air filter x 5;J--D--pt15853 lg491588, Stens 102-549 Oregon 30-710 30-927, Rotary 2838, Ariens 21529800，For more models, please see the detailed descriptions below . (Product material): Cnornus uses a new high-quality filter material for air filters and a new environmentally friendly process. The original filtration efficiency of this material filter element is more than 99.5%, and its performance is better than that of traditional oil-bath air filters. This increases the life of your lawn mower by further preventing micro dust particles from entering the engine and carburetor. (Product Features) : Corrugated filter design for higher filtration efficiency, larger filter area, lower dust transmission rate, higher dust holding capacity, higher air flow, longer service life. longer