The Ferris Mulch Kit for 48" iCD decks is compatible with models like the IS600, IS700, SRS, FW15, FW25, FW35, FW45, IS500Z, and IS1500Z (serial numbers 2015355958 & above). It includes high-quality mulching blades, transforming your mower into a powerful mulching machine. This system recycles grass clippings into nutrient-rich mulch, promoting a healthier lawn naturally. Manufactured by Ferris, the kit is built for durability and reliable performance in any mowing conditions.