12" BUTTERFLY DAMPER - For T-Bar, Drop Ceiling Grilles, (12" round duct opening) Sheet Metal/Adjustable Elbow actual front end outer dimensions

actual front end outer dimensions are approximately 36 5/8" width X 8 5/8" height

complies with ASTM E 84

and conventional HVAC air conditioning system line sets

air conditioning

12" BUTTERFLY DAMPER - For T-Bar, Drop Ceiling Grilles, (12" round duct opening) Sheet Metal/Adjustable Elbow actual front end outer dimensions+ Product Details Size 12" round duct opening Heavy Gauge Steel Heavier gauge than needed, built for durability and long life in mind, but still very thin. Installation Location Ceiling. Design This airflow control component are made to connect to a drop ceiling lay in diffuser grille. Powder Coat Finish smooth, shiny, scratch resistant, beautiful. Looks like it was just waxed. + Product Description Introducing the 6" Butterfly Damper Your Solution