Metal Thermostat Guards: Constructed of 18-2 gauge steel and are finished with a durable baked enamel.
Plastic Thermostat Guards: Constructed of hi-impact plastic, and are designed for use in offices, restaurants, or other businesses where lightweight, medium protection is required to avoid tampering.
Ring base is for installation over existing thermostats. Solid base is for new installations (added strength). All models furnished with locking key and mounting hardware. Thermostat guards can be installed in a vertical or horizontal position.

Specifications:

Solid Base: 6 1/4"H x 4 3/4"W x 3"D
Ring Base: 6"H x 3 3/16"W x 3 1/8"D

Applications:

Barber-ColmanAll thermostats except dual microtherm models
CamstatT17C, TM17C, T17H, TM17H
General ControlsT80, T90, T91, T199, T330 Series, T340 Series
HoneywellT26, T42, T87, T92, T651, T872, T874, T882, T921, T6051
PennAll wall thermostats
RobertshawTH200, TX400, TA500, TH500, TX550, TH570, TH572
White-Rodgers1A65-41, 1A66-41, 1C30, 1E30, 1F30, 1F56, 1F58