Adjustable Pressure Switch for Open 3-7 PSI Set at 4 L8

I bought this pressure switch to control my 2nd fuel pump on my Turbo LS car.I like the fact that it is adjustable, easy to install and is very straight forward.Set it to 3psi and at 3psi it kicks on 2nd pump and all is well.

accurate pressure both ways, open and closed

Works like it should. I have it in my car controlling the pump to spray alcohol/water at 10 psi.