30"W X 12"H [Duct Opening] ALUMINUM RETURN GRILLE - Easy Air Flow - Linear Bar Grilles [Outer Dimensions: 31.875"W X 13.875"H] 6in diameter 10" X 4" Is The

10" X 4" Is The Size For The Duct Opening (floor/vent hole) Measurement Only

and are ready to go for the next job

+ Product Details Perfect Fit & Easy Sizing - Designed for a 12" x 36" or 36" x 12" duct opening (measured at the opening)

Commercial Grade Aluminum - Will Never Rust - Designed for Warehouses

+ Product Details Size - 20"w X 6"h X 2"d (for duct opening measurement only)

30"W X 12"H [Duct Opening] ALUMINUM RETURN GRILLE - Easy Air Flow - Linear Bar Grilles [Outer Dimensions: 31.875"W X 13.875"H] 6in diameter 10" X 4" Is The+ Product Details Size 30"w X 12"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 31. 875" width X 13. 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