Intermatic PF1102T Timer Mechanism only 240 VAC, 3HP Timer provides both automation and protection for the equipment against freeze damage They turn the pump and heater ON when the outdoor temperature drops below the temperature set by the user-adjustable thermostat 34/1000-Inch drawn steel, electrostatically coated, beige color enclosure 93/8-Inch (23.8 cm) Height by 51/4-Inch (14.0 cm) Width by 35/8-Inch (9.2 cm) Diameter