10" BUTTERFLY DAMPER - For T-Bar, Drop Ceiling Grilles, (10" round duct opening) 12" Diameter Actual Filter Size – 27 Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

Actual Filter Size – 27 3/4"w x 27 3/4" x 1"

High Quality – Rigid aluminum construction with counter-sunk screw holes (screws included) and no sharp edges

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

+ Product Details Size – 12"w X 28"h is the size for the duct opening measurement only

Noise free components - no vibrating louvers etc

10" BUTTERFLY DAMPER For T Bar, Drop Ceiling Grilles, (10" round duct opening) 12" Diameter Actual Filter Size – 27 Compatible With Duct 7in Applications This sheet metal DDAG A 1212 Actual Filter Size – 27 3 4"w x 27 3 4" x 1" High Quality – Rigid aluminum construction with counter sunk screw holes (screws included) and no sharp edges