Description TEMPERATURE CONTROL (THERMOSTAT) Penn White Rogers 1609-90 FITS Mueller Models O and M FITS OTHER BRANDS TOO. DOUBLE POLE SWITCH - Note detail image shows inside with 3 screw positions Specifications -20 to +50°F Range 3 Degree F To 25 Degree F Adjustable Differential 8' Capillary SPST Close On Rise Mueller number 3558 GEA WestfaliaSurge number 4999-1010-536
