DOP30-909 BRIGGS & STRATTON foam air filter fits 6, 7, and 8 HP vertical engines 146700, 147700, 170700, 171700, 190700, and 191700 series. Size: 8-5/8" L x 4-3/8" W x 1-1/2" H. This is a qualtity aftermarket part that replaces briggs and stratton part numbers 270528 and 270528S.