8" RADIAL DAMPER - Control Your Airflow on drop ceiling grilles (8" round duct opening) 18in diameter + Product Details Size –

+ Product Details Size – 20"w X 36"h is the size for the duct opening measurement only

+ Product Details Size - 6"w X 28"h is the size for the duct opening measurement only

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+ Product Details Size - 40"w X 20"h is the size for the duct opening measurement only

8" RADIAL DAMPER - Control Your Airflow on drop ceiling grilles (8" round duct opening) 18in diameter + Product Details Size –+ Product Details Size 8" round duct opening Heavy Gauge Steel Heavier gauge than needed, built for durability and long life in mind, but still very thin. Installation Easy to Install. Design This airflow control component are made to connect to HVAC diffuser and restrict airflow. + Product Description Introducing the 8" Radial Damper Your Solution for Controlled Airflow Experience enhanced indoor comfort with our 8" Radial Damper. Designed to