Gravely ZT-HD Replacement Lawn Mower Seat. Designed for Gravely ZT-HD zero-turn lawn mowers. Durable, weather-resistant upholstery for long-lasting performance. Bracket assembled under seat. CONDITION: Previously mounted and test fitted. The seat has a couple spots of some frayed stitching and some scrapes on the bracket but other than that the seat is in great condition still. Barley has any time at all on it. GRAVELY ZT-HD Zero Turn Lawn Mower. Fitment information is based upon the stock version of the motorcycle or unit referenced and any accessory added or other modification could invalidate fitment. Photo is for illustration purposes only, actual product may slightly differ. We will be sure to respond to you as quickly as possible. Tracking information will be uploaded to your order as soon as it is available. 2 Boss Performance W191S7757 Racine Avenue Muskego.