18" X 12" 2-Way Air Supply Grille – Steel HVAC Vent Cover with Damper, Wall/Ceiling Register, White Color_Black please note that the total

please note that the total outer dimensions of the grille measure 10" in diameter

75"H – fits a 10" x 8" duct opening

actual front end outer dimensions are approximately 28 5/8" width X 28 5/8" height

16" Circular Round Aluminum HVAC Supply Grille Air Diffuser - With Butterfly Damper - Vent Duct Cover

18" X 12" 2-Way Air Supply Grille – Steel HVAC Vent Cover with Damper, Wall/Ceiling Register, White Color_Black please note that the total+ Product Details Outer dimensions: 19. 75"W x 13. 75"H fits a 18" X 12" 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