O-ring, diaphragm and seals kit for the Auto Air and snap connector hose.
Note: this kit includes the o-ring for the 3/8" UNF connector at the first stage end of the hose.
It also includes the parts (o-ring and blue pebax washer) that can be replaced on the female snap connector without special tools.
If you need to repace the other internals of the female snap connector, kit - EV50BKIT - is available but this will require appropiate service tools and knowledge. Alternatively, the snap connector can be returned to the factory for sevice.