This is a genuine OEM replacement part, it is sold as a individual kit.
The purpose of the N008792 Regulator Repair Kit is to repair the regulator on the models shown below.
Over time the internal parts of the regulator will become worn and have to be replaced.
This is a huge feature on these compressors, inasmuch as on other compressors you have to replace the complete manifold assembly.
It also includes instructions on how to install it.