Line Volt Mechanical Tstat, Switch Type SPST, Switch Action Close on Rise, Number of Switches 1, Control Range -30 Degrees to 100 Degrees F, Differential 3 Degrees to 12 Degrees F, Height 4-3/8 In., Width 2-1/8 In., Depth 1-13/16 In., Overall Length 4-3/8 In., Temp. Sensitivity +/-2 Degrees F, Sensor Type Bulb, Sensing Bulb Dia. 3/8 In., Sensing Bulb Length 4 In., Capillary Length 72 In., For Use With HVAC/R Applications, Color Gray, Enclosure Type Galvanized/Steel, 120 to 277VAC, 120 to 277VAC