Round to Oval Straight Boot - 5" Straight Transitioning Duct Boot is Compatible with Duct 5" Return Grille T-Bar With Plenum Box Actual Filter Size – 35 4 X 12 Is CRFG2028 Width_14in

Actual Filter Size – 35 3/4"w x 27 3/4" x 1"

+ Product Details Size – 10"w X 12"h or 12" x 10" is the size for the duct opening measurement only

angle them down for effective warmth distribution

+ Product Details Size & Compatibility – The size of the side round ceiling box is 6" X 6" X 4" and it is compatible with duct 4"

Actual Filter Size – 23 3/4"w x 19 3/4" x 1"

Round to Oval Straight Boot 5" Straight Transitioning Duct Boot is Compatible with Duct 5" Return Grille T Bar With Plenum Box Actual Filter Size – 35 4 X 12 Is CRFG2028 Width_14in Actual Filter Size – 35 3 4"w x 27 3 4" x 1" + Product Details Size – 10"w X 12"h or 12" x 10" is the size for the duct opening measurement only