I bought it to regulate a 10 gallon portable air tank . I added a Goodyear 3/8-Inch by 3-Feet Lead-In hose and some quick connect between the regulator and the air hose. now i can fill up the tank faster by not using the valve stem. and i don't have to use the regulator if i'm trying to fill up a tire. it's working well, the regulator allows me to regulate the pressure down to 80 psi, less wear and tear on my tools, and keeping more air in the tank.
The bracket and the gauge are not shipped attached. The gauge is a 1/8 npt, the inlet and outlets are 1/4npt, and the flow is right to left.