The best quanlity , the lowest price. Descriptions:1.Lowest Pressure(on):40PSI2.Hightest Pressure(off):175PSI3.Female:1/4"4.With One-way Valve Or With Four way Valve5.Coverage:USR.CNR---enclosed,three pole,single phase pressure operated switch to be used for the auto-control of air pump6.Pressure Setting:40-70PSI,50-80PSI,70-100PSI,80-115PSI,90-125PSI