20"W X 25"H [Duct Opening] ALUMINUM RETURN GRILLE - Easy Air Flow - Linear Bar Grilles [Outer Dimensions: 21.875"W X 26.875"H] Color_Anodized Aluminum + Product Details Size -

+ Product Details Size - 36"w X 4"h is the size for the duct opening measurement only

+ Product Details Size - 22"w X 10"h is the size for the duct opening measurement only

+ Product Details Size – 10" x 10" is the size for the duct opening measurement only

+ Product Details Size – 24" x 24" with 10" collar T-Bar drop ceiling perforated return grill - metal back casing

These are airflow control components made to connect to supply grilles of the drop ceiling

20"W X 25"H [Duct Opening] ALUMINUM RETURN GRILLE - Easy Air Flow - Linear Bar Grilles [Outer Dimensions: 21.875"W X 26.875"H] Color_Anodized Aluminum + Product Details Size -+ Product Details Size 20"w X 25"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 21. 875" width X 26. 875" height. High Quality High quality aluminum with counter sunk screw holes (screws included) and no sharp edges. Design Unrestricted airflow For Your HVAC system noise free components no vibrating louvers etc. Powder Coat Finish Smooth, shiny, scratch resistant, beautiful. Looks like it was