The Schneider Electric (Barber Colman) 21-933-1 Thermostat Cover is a protective enclosure designed for HVAC thermostats and control devices. It fits over the thermostat to shield internal components from dust, damage, and unauthorized adjustment while allowing accurate temperature sensing. Commonly used in commercial buildings, air handling units, and zone control systems, this gray ... https://www.partshnc.com/gray-cover-with-fc-markings