Thermostat ProtectorsMolded of 1 8" thick, heavy duty polycarbonate Offer excellent protection against tampering, abuse and accidental damage without affecting operation of thermostat or sensor Holes in the frame allow air to circulate freely Inner wall prevents tampering with dials and levers All thermostat covers have a key lock assembly Easy and quick installation Available for flush and surface mount applications (with use of spacer) Spacer adds 2" in depth and can