Display pack of 1 (698369) air filter. This foam element air filter provides superior protection against the destructive effects of dirt ingestion. Used on select 3.5-4.5 HP Q45, Classic, Sprint, and Quattro engines with plastic air cleaner housing, and 450-600 Series 4.5-6 Gross Torque engines, this OEM part ensures proper fit and performance to maintain the life of your Briggs & Stratton engine.