Small Thermostat Protector Indoor Color Clear Material Polycarbonate Mounting Flush Width 4 in Depth 1 3/8 in Height 4 in For Use With Thermostats Energy Sensors Operating Temp -40 Degrees to 250 Degrees F Features Polycarbonate Cover with Lock Helps Stop Vandalism Damage and Tampering of Small Thermostats or Energy Sensors Holes In The Frame Allow Air to Circulate Freely Inner Wall Prevents Tampering with Dials and Levers Includes Lock