Drop Ceiling HVAC Supply Grille - For T-Bar Lay-In - 2 Coned - 24" x 24" - For 14" Vent Connection - Black Compatible with Duct 6" + Product Details Size -

+ Product Details Size - 4"w X 36"h is the size for the duct opening measurement only

+ Product Details Size – 10"w X 28"h is the size for the duct opening measurement only

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+ Product Details Outer dimensions: 9

+ Product Details Size - 26"w X 24"h is the size for the duct opening measurement only

Drop Ceiling HVAC Supply Grille - For T-Bar Lay-In - 2 Coned - 24" x 24" - For 14" Vent Connection - Black Compatible with Duct 6" + Product Details Size -Drop Ceiling HVAC Supply Grille For T Bar Lay In 2 Coned 24" x 24" For 6" Vent Connection Black These are specially sized to fit into all drop ceiling's, 24"x 24", also called T Bar systems. Can be hooked up with our "Butterfly Dampers" for precise airflow control Why HVAC Premium? You may think of grilles and registers as a generic component of the ventilation system in your house. But they are also the most visible representation of you air system.