SMALL, UNIVERSAL GUARD TYPE; NON-PROGRAMMABLE THERMOSTAT USED ON; TG510 MODEL; VERSAGUARD[TM] BRAND; OVERALL DIMENSION 5-7/8" WIDTH X 2-1/2" DEPTH X 5-7/8" HEIGHT; COLOR PAINTED METAL (BODY), OPAQUE POLYSTYRENE (WALL PLATE, RING BASE)