Square D,PRESSURE SWITCH 575VAC 5HP G +OPTIONS,-,0.125 inch NPSF internal conforming to UL 508,125...150 psi,20...40 psi,200 psi (40...170 psi),65...200 psi,300 PSIG,40 to 170 PSIG,DPST,General Purpose (Indoor),NEMA 1,Pressure Switch,Pumptrol,Screw Clamp,UL listed, CSA,control electrically driven water pumps and air compressors,fresh water (-22...257 .F)-air (-22...257 .F)