2-WAY INTERNAL PILOT-OPERATED SOLENOID VALVES NORMALLY CLOSED, ,DESIGNED FOR LONG LIFE AND SOFT CLOSING, VALVES ARE MADE OF STAINLESS STEEL WITH STAINLESS STEEL INTERNAL PARTS, OPEN-FRAME SOLENOID, VALVE IS CLOSED WHEN SOLENOID IS DE-ENERGIZED, OPEN WHEN ENERGIZED(IMPORTANT):MINIMUM OPERATING PRESSURE DIFFERENTIAL REQUIRED IS 10 PSI TO OBTAIN FULL FLOW, TEMPERTURE LIMITATIONS:MAXIMUM AMBIENT 104 DEGREE F., MAXIMUM FLUID: 180 DEGREE F.1/4"NPT, 4.0 WATTS, WATER(PSI)10-125, 24V, 50/60 HZ, WEIGHT:.35 POUNDS, DIMS:2-1/2"H X 1-3/4"W. IN MFG BOX, ORIGIN: MEXICO