Line Volt mechanical Tstat, 120 to 277VAC line Volt mechanical Tstat, switch Type SPDT, switch action open/close on Rise, number of switches 1, control range -30 Degrees to 100 Degrees F, differential 3 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 3 in., capillary Length 24 in., for use with HVAC/R applications, color Gray, enclosure Type galvanized/steel, 120 to 277VAC, 120 to 277VAC.