The Ferris Mulch Kit, designed for serial numbers 2015425347 and above, fits models like the F800X, F320Z, IS3200Z, and others with a 72" iCD deck. It transforms your mower into a powerful mulching machine, finely chopping grass clippings to naturally nourish your lawn. The kit includes a mulch plate, blades, and necessary hardware for easy installation, promoting healthier growth without the need for chemical fertilizers.