12" BUTTERFLY DAMPER - For T-Bar, Drop Ceiling Grilles, (12" round duct opening) Fixed Blades + Product Details Size –

+ Product Details Size – Duct end cap is 18" X 8" | 26-gauge galvanized steel end cap

+ Product Details Size – 12" X 4" is the opening (vent hole) dimension - actual size is approx

This 14" X 12" end cap is constructed with 26-gauge galvanized steel

GPH @ 1 FT: - 10

+ Product Details Perfect Fit & Easy Sizing - Designed for a 24" x 26" OR 26" x 24" duct opening (measured at the opening)

12" BUTTERFLY DAMPER - For T-Bar, Drop Ceiling Grilles, (12" round duct opening) Fixed Blades + Product Details Size –+ 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