The Prier 07 Ballcock Parts is a kit that rebuilds the Prier 07 ballcock. The kit contains the upper and lower diaphragm. It also has the 4 body screws and the thumb screw. There is also a nylon plunger in this kit. All of the parts in this kit are to rebuild the 07 ballcock. If your ballcock is leaking or making noises this kit will replace it. This kit can completely rebuild your 07 Ballcock. It is a genuine Prier kit.