16" X 16" 4-Way Air Supply Grille – Steel HVAC Vent Cover with Damper, Wall/Ceiling Register, White Insulated Line + Product Details Size –

+ Product Details Size – 12"w X 12"h is the size for the duct opening measurement only

6"w X 6"h 3-Way Fixed Curved Blade Air Supply Diffuser - Vent Duct Cover - Grille Register - Sidewall or Cieling - High Airflow - White

Actual Filter Size – 9 3/4"w x 11 3/4" x 1"

actual front end outer dimensions are approximately 18 5/8" width X 20 5/8" height

Whether installed on a sidewall or ceiling

16" X 16" 4-Way Air Supply Grille – Steel HVAC Vent Cover with Damper, Wall/Ceiling Register, White Insulated Line + Product Details Size –+ Product Details Outer dimensions: 17. 75"W x 17. 75"H fits a 16" X 16" 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