36"W X 8"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 37.75"W X 9.75"H] 18" Round Duct Pipe angle them down for effective

angle them down for effective warmth distribution

flex-shrink: 0

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

R value rating of insulation - r3

High Quality – Solid stamped steel with counter-sunk screw holes (screws included) and no sharp edges

36"W X 8"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 37.75"W X 9.75"H] 18" Round Duct Pipe angle them down for effective+ Product Details Size 36"w X 8"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 37. 75" width X 9. 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.