This product is an Aftermarket air filter designed for Briggs & Stratton 392642, 394018, and 394018S V-Twin OHV Vanguard engines. It comes in a pack of 1 and has dimensions of 2.13" height, 7.25" length, and 0.45" width. Made in China, this air filter is a reliable replacement part for maintaining the performance of your lawn mower. Additionally, it includes a California Prop 65 Warning, indicating that it may contain chemicals that could be harmful if inhaled.