With the Ninja SPA Regulator Rebuild Kit you can replace any part in your tank regulator to ensure that your compressed air tank is working at peak performance levels. Adjust your tanks output pressure by adding and removing shims or replace a broken burst disk with the 1.8K burst disk included in the Ninja SPA Regulator Rebuild Kit. The kit also includes a Piston with O-rings included, along with 2 Bonnet Screws and a Valve Seat, allowing for a complete replacement of your regulator internals.