18" X 8" 3-Way Air Supply Grille – Steel HVAC Vent Cover with Damper, Wall/Ceiling Register, White Color_R-4.2 Yellow + Product Details Size –

+ Product Details Size – 50"w X 20"h is the size for the duct opening measurement only

+ Product Details Size – 24" x 24" with 10" collar T-Bar drop ceiling perforated return grill - metal back casing

75"H – fits a 18" X 4" duct opening

our Circular Air Supply Valves are ideal for low and medium pressure ventilation air conditioning systems

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18" X 8" 3-Way Air Supply Grille – Steel HVAC Vent Cover with Damper, Wall/Ceiling Register, White Color_R-4.2 Yellow + Product Details Size –+ Product Details Outer dimensions: 19. 75"W x 9. 75"H fits a 18" X 8" duct opening Durable stamped steel construction ensures long lasting performance Designed for sidewall and ceiling installation with included screws Multi shutter damper with easy lever for precise airflow control Smooth powder coated white finish for a sleek look and scratch resistance + Product Description Maximize your homes airflow with this premium Air Supply Grille air supply