Square D,PRESSURE SWITCH 575VAC 5HP G +OPTIONS,-,0.125 inch NPSF internal conforming to UL 508,110...125 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,air (-22...257 .F)-fresh water (-22...257 .F),control electrically driven water pumps and air compressors