Briggs & Stratton, Foam Air Filter Element, Fits On 475 & 500 Series B&S Engines With A Range Of 148 cc-158 cc, Also Fits Previous Classic, Sprint & Quattro Series Engines With Plastic Air Cleaner Housings & A Range Of 3.5 HP - 4.5 HP, For Use On Brands Such As Craftsman, MT, Poulan, Snapper & Many Others Equipped With The Listed Engines, DIY Version Of Briggs Service Part #698369.