This mulch blade set is designed for Ferris IS600 mowers with a 44" deck and serial numbers 2015349493 and above, providing three high-performance blades for efficient mulching. The blades finely chop grass clippings for quicker decomposition and improved lawn health. As genuine Ferris parts, they ensure durability and reliable performance under frequent use. The set includes blades only, making it a simple replacement to enhance your mower's mulching capabilities.