Replacement lawn mower air filter for use with 4.5 - 6.5 H.P. engines on walk-behind mowers. Fits 350, 405, and 550 series engines on Troy-Bilt, MTD, MTD Gold, White Outdoor, Yard-Man, Yard Machines, Huskee and Bolens walk-behind mowers. Includes foam pre-cleaner filter. Installation and usage instructions are included in the package.