UNIVERSAL DESIGN SERVES THE WIDEST VARIETY OF APPLICATIONS. USED FOR STARTING OR STOPPING ELECTRICALLY OPERATED EQUIPMENT SUCH AS SIGNAL LIGHTS ALARMS MOTORS AUTOMATIC BURNERS AND METERING DEVICES. 1"" NPT CONNECTION SINGLE POLE DOUBLE THROW SWITCHING. SEALED MONEL BELLOW. TWO ELECTRICAL KNOCK-OUTS ALLOWS CONNECTION FROM EITHER END. FOUR STAINLESS STEEL PADDLES INCLUDED 1"" 2"" 3"" & 6"".