The Hustler 365668 Mulching Kit is an authentic OEM accessory designed to convert compatible Hustler zero-turn mowers for mulching operations. This kit is specifically engineered to fit various Hustler Raptor and FasTrak models, including the Raptor SD 54", Raptor X 54", Raptor XD 54", and FasTrak 54". It helps to finely cut grass clippings, returning nutrients to the lawn and promoting a healthier turf. The kit ensures optimal performance and fitment when used with the specified Hustler mower decks.