4"W X 36"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 5.75"W X 37.75"H] Aluminum Bar + Product Details Size -

+ Product Details Size - 25"w X 25"h is the size for the duct opening measurement only

order a 14x20 grille

Design – Removable face for cleaning and access to damper - wooden damper for airflow shutoff control

This grille has a high standard of design

this flex duct decreases the pressure loss and provides a more hygienic environment

4"W X 36"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 5.75"W X 37.75"H] Aluminum Bar + Product Details Size -+ Product Details Size 4"w X 36"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 5. 75" width X 37. 75" height. Design Easy unrestricted airflow for your HVAC system 50 angled to provide maximum airflow. High Quality Solid stamped steel with counter sunk screw holes (screws included) and no sharp edges. Powder Coat Finish Smooth, shiny, scratch resistant, beautiful. Looks like it was just waxed.