RELIABILT Brand, Durability, Quality, Value for Money, Longevity and Trust Factor Steel construction, not easily deformed, long service life 1/2-In spaced fins, the number of louvered columns and mounting holes will vary based on the size of the grille ordered Return grille is an intake vent that pulls air back to the air handler The number of louvered columns and mounting holes will vary based on the size of the grille ordered Measure the size of the duct opening width by height in the wall (not the old register itself) to determine the correct size to order Mounting screws included Color/Finish Family: White Manufacturer Color/Finish: White Type: Grille Length (Inches): 21.75 Rough Opening Length (Inches): 20 Rough Opening Width (Inches): 20 Weight (lbs.): 3.81 Width (Inches): 21.75 Airflow Direction: 1-way Commercial/Residential: Commercial/Residential Design: Louvered Hardware Included: No Hinged: No Installation Location: Wall Installation Type: Surface mount Insulation Included: No Material: Steel Package Quantity: 1 Paintable/Stainable: Paintable Use Location: Sidewall/Ceiling Warranty: 2-year limited CA Residents: Prop 65 Warning(s): No UNSPSC: 39111800