The MTD 196731678 Mulch Kit is an original equipment manufacturer (OEM) accessory designed to convert 46 cm (18 inch) cutting decks on a range of MTD, Cub Cadet, and Troy-Bilt lawn tractors and ride-on mowers into efficient mulching systems. This comprehensive kit typically includes specialized mulching blades and a durable mulching plug, enabling grass clippings to be finely shredded and returned to the lawn as natural fertilizer. Optimizing your mower's performance, this genuine MTD mulching solution promotes healthier lawn growth and reduces the need for bagging.