6" x 6" [Duct Opening] Ceiling Supply Diffuser Vent Cover – Corner Direction with Full Aluminum Frame, Back Blades & Opposing Blade Lever Damper [Outer Size: 9" x 9"] Copper Coil + Product Details Size – Fixed 45 horizontal blades 866FLRSTRT Aluminum Adjustable Curved Blade

+ Product Details Size – 20" x 24" or 24" x 20" is the size for the duct opening measurement only

width: 10px

actual front end outer dimensions are approximately 36 5/8" width X 20 5/8" height

5" wider - SEE BELOW HOW TO MEASURE A GRILLE

1 piece of foam pad

6" x 6" [Duct Opening] Ceiling Supply Diffuser Vent Cover – Corner Direction with Full Aluminum Frame, Back Blades & Opposing Blade Lever Damper [Outer Size: 9" x 9"] Copper Coil + Product Details Size – Fixed 45 horizontal blades 866FLRSTRT Aluminum Adjustable Curved Blade + Product Details Size – 20" x 24" or 24" x 20" is the size for the duct opening measurement only width: 10px