This Fixed Pressure Switch is on at 70psi and off 115psi. A higher psi pressure switch sounds good, but it means it is taking too much air pressure to lift your vehicle and you probably need LARGER diameter bags. Larger the diameter, the less pressure it takes to lift. High psi will cause your compressor to be overworked, overheated and shorten the life span.
Threads are 1/8 inch NPT.