18" X 12" 2-Way Air Supply Grille – Steel HVAC Vent Cover with Damper, Wall/Ceiling Register, White 12in diameter For 8" duct opening

For 8" duct opening

75"H – fits a 10" X 4" duct opening

+ Product Details Size - 16"w X 28"h is the size for the duct opening measurement only

Actual Filter Size – 29 3/4"w x 5 3/4" x 1"

Tamper-Proof Locking Mechanism – Includes an eight-tumbler lock with a supplied key to prevent unauthorized access

18" X 12" 2-Way Air Supply Grille – Steel HVAC Vent Cover with Damper, Wall/Ceiling Register, White 12in diameter For 8" duct opening+ 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