8"W X 14"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 9.75"W X 15.75"H] 3-Pack This 24" X 10" end

This 24" X 10" end cap is constructed with 26-gauge galvanized steel

This 8" X 8" end cap is constructed with 26-gauge galvanized steel

this access door is built to last and never rust

Hose Diameter Connection Size: 6mm i/d

8"W X 14"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 9.75"W X 15.75"H] 3-Pack This 24" X 10" end+ Product Details Size 8"w X 14"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 9. 75" width X 15. 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.