The Genuine Factory Parts™ 30" mulch it allows the mower to effectively disperse finer clippings of grass while mowing. Recycling grass clippings back into your lawn through mulching is one of the best ways for your lawn to receive nutrients it needs to thrive. Attachments and accessories by Genuine Factory Parts are designed specifically for CRAFTSMAN®, Cub Cadet® & Troy-Bilt® Have confidence that they are going to provide you the optimal performance and help you get the most out of your riding mower.