Black T-Bar Drop Ceiling Grille - Flat Plate Plaque Diffuser - 24" x 24" - 12" Collar Black Its locking eight-tumbler mechanism and

Its locking eight-tumbler mechanism and supplied key safeguard your thermostat from tampering

actual front end outer dimensions are approximately 36 5/8" width X 18 5/8" height

+ Product Details Size - 25"w X 30"h is the size for the duct opening measurement only

+ Product Details Size - 28"w X 8"h X 2"d (for duct opening measurement only)

Black T-Bar Drop Ceiling Grille - Flat Plate Plaque Diffuser - 24" x 24" - 12" Collar Black Its locking eight-tumbler mechanism and+ Product Details Size 24"w X 24"h. These are specially sized to fit into all drop ceilings, also called T Bar systems. Can be hooked up with our "Butterfly Dampers" for precise airflow control. For 12" duct opening High Quality Heavy gauge all steel construction. Installation Location Ceiling. Design These Supply Diffusers with integral round necks are recommended for heating, ventilating and cooling. Round neck to square face construction results in