14" x 14" [Duct Opening] Ceiling Supply Diffuser Vent Cover – 1-Way Airflow with Full Aluminum Frame, Back Blades & Opposing Blade Lever Damper [Outer Size: 17" x 17"] 6in diameter High Quality – High quality

High Quality – High quality steel construction

+ Product Description Introducing our 4" x 20" Floor Grille - a reliable and durable air grill designed for exceptional performance and built to last

+ Product Details Size - 8"w X 4"h is the size for the duct opening measurement only

75"H – fits a 20" X 12" duct opening

+ Product Details Size & Compatibilty - The 18" to 16" round metal pipe reducer & increaser 30 gauge is compatible with duct 18" to 16"

14" x 14" [Duct Opening] Ceiling Supply Diffuser Vent Cover – 1-Way Airflow with Full Aluminum Frame, Back Blades & Opposing Blade Lever Damper [Outer Size: 17" x 17"] 6in diameter High Quality – High quality+ Product Details Size Refers to duct opening only. The face frame extends roughly 1. 5" on each side. Do not measure the overall grille for sizing. Design All aluminum frame and back blades. Rustproof and built to last in moisture prone environments. Quiet Airflow Opposing blade damper design reduces vibration and noise for smoother air distribution. Clean Finish White powder coated surface resists chips, scratches, and discoloration over time. Easy