This adjustable barrel regulator is a great set-it and forget-it device to place in-line with your ARB. If you have a high pressure air source, like a pre-set regulator at 150 psi, then you can step down the pressure using this. Dropping the pressure to your ARB solenoids and locker components can reduce wear and extend the longevity of your components. 

This barrel regulator is adjustable from 50-145 psi with a maximum inlet pressure of 150 psi.

1/4" NPT Male inlet 

1/4" NPT Female outlet