A-B1392286-AI FILTER-A/C CARTRIDGEOne New Aftermarket Replacement Air Filter (A C Cartridge) Fits Briggs & Fits Stratton Small Engines This round style, pleated paper air filter cartridge protects Fits Briggs and Stratton horizontal and vertical shaft small engines from dirt ingestion, helping maintain performance and extend engine life. It fits the air cleaner assembly on select 10, 11, and 12 HP engines in the 251400, 252400, 253400, and 255400 series. Specifications Style: Round