Square D,PRESSURE SWITCH 575VAC 5HP G +OPTIONS,-,0.375 inch NPSF internal conforming to UL 508,20...40 psi,200 psi (40...170 psi),65...200 psi,90...120 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)