Line Volt Mechanical Tstat for Heating and Cooling, 120 to 277VAC/ OVERALL LENGTH: 5.607 INCHES NOMINAL OVERALL HEIGHT: 2.150 INCHES NOMINAL OVERALL WIDTH: 2.000 INCHES NOMINAL DISTANCE BETWEEN MOUNTING FACILITY CENTERS: 2.037 INCHES NOMINAL TEMP SENSING ELEMENT TYPE: INTERNAL SENSOR OPERATING TEMP RATING: -10.0 DEG FAHRENHEIT NOMINAL AND 100.0 DEG FAHRENHEIT MAXIMUM MOUNTING METHOD: SURFACE FEATURES PROVIDED: INTEGRAL DIAL MOUNTING FACILITY PATTERN: FOUR POSITION RECTANGULAR CONTACT LOAD CURRENT RATING: 22.0 AMPERES RESISTIVE LOAD SINGLE VOLTAGE CONTACT VOLTAGE RATING IN VOLTS: 277.0 AC AT SEA LEVEL SINGLE VOLTAGE STYLE DESIGNATOR: 70 RECTANGULAR