40"W X 16"H [Duct Opening] ALUMINUM RETURN GRILLE - Easy Air Flow - Linear Bar Grilles [Outer Dimensions: 41.875"W X 17.875"H] 18" Diameter The 1/2" white insulation

The 1/2" white insulation

+ Product Details Perfect Fit & Easy Sizing - Designed for a 30" x 8" OR 8" x 30" duct opening (measured at the opening)

actual front end outer dimensions are approximately 32 5/8" width X 18 5/8" height -

actual front end outer dimensions are approximately 26

actual front end outer dimensions are approximately 22 5/8" width X 28 5/8" height

40"W X 16"H [Duct Opening] ALUMINUM RETURN GRILLE - Easy Air Flow - Linear Bar Grilles [Outer Dimensions: 41.875"W X 17.875"H] 18" Diameter The 1/2" white insulation+ Product Details Size 40"w X 16"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 41. 875" width X 17. 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