Rectangular Duct End Cap | 12" X 10" End Cap Brown Applications – The snap on 4 X 12 Is CRFG2028 Width_14in

Applications – The snap on system makes for easy installation and will prevent the seam from coming apart while also preventing air leakage making your HVAC system more energy efficient and in turn

+ Product Details Size – Size - 36mm

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

actual front end outer dimensions are approximately 36 5/8" width X 38 5/8" height

+ Product Details Size & Compatibility – The size of the side round ceiling box is 8" X 8" X 6" and it is compatible with duct 6"

Rectangular Duct End Cap 12" X 10" End Cap Brown Applications – The snap on 4 X 12 Is CRFG2028 Width_14in Applications – The snap on system makes for easy installation and will prevent the seam from coming apart while also preventing air leakage making your HVAC system more energy efficient and in turn + Product Details Size – Size 36mm