This is a complete seat assembly, which includes the seat, the neutral safety seat switch, the frame to carry the factory toolbox, and the seat rails with hinges. We just acquired this, and it is THE LAST ONE Honda had in their inventory. It is now a discontinued part number. Buy it now before someone else does and you end up kicking yourself for not moving more quickly on it. This is your last chance for a new seat for your H5518! This seat MAY fit an RT5000 or an H5013 with some modifications, but I can’t guarantee it.