20″W x 4″H Steel Adjustable Air Supply Grille | Register Vent Cover Grill for Sidewall and Ceiling | White | Outer Dimensions: 21.75″W X 5.75″H for 20×4 Duct Opening

Adjustable Air Supply Grille for 20×4 Duct Opening, White, Steel

Adjustable spaced fins.
Primary use: Side wall and ceiling.
Screws are included with the system, standard.
All-steel construction.
Durable white powder coated.
Standard color is white (Ral9016).

How To Measure A Grille
Always measure the size of the duct opening (the ‘hole’ in the duct/wall). Do not measure the entire size of the register itself. Size of the grille is; listed size +1.75-inch.

Understanding Width & Height
In a grille size, the first number always represents the width and the second one is the height. As an Example: If the hole on your wall/duct is 20 inches wide by 4 inches tall, order 20×4 option.