Square D,PRESSURE SWITCH 575VAC 5HP G +OPTIONS,-,0.25 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,NEMA 3R,Pressure Switch,Pumptrol,Rainproof and Ice proof (Indoor/Outdoor),Screw Clamp,UL listed, CSA,control electrically driven water pumps and air compressors,fresh water (-22...257 .F)-air (-22...257 .F)