THE MATCHED AIR PIPE FOR THIS FITTING PLEASE REFER THE FOLLOWING AMAZON LINK:

Description for the fitting:

Material: High quality brass material with Nickel plating against corrosion
Working Pressure: 200 psi Maximum working pressure
Sealing: Double O-ring ensure 100% sealing in high working pressure
Installation: Easy installation and the tubing also can be removed if needed
Application: Used with ID 3/4 Inch tubing system