8"W X 18"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 9.75"W X 19.75"H] Compatible with Duct 6" Priming the Pump: If required

Priming the Pump: If required

+ Product Description Protect and secure your thermostat with this high-quality Clear Plastic Thermostat Guard

Locking Security System – Features a built-in eight-tumbler lock and a supplied key to prevent tampering and maintain consistent temperature settings

providing additional safety and protection for your equipment and surroundings

actual front end outer dimensions are approximately 30 5/8" width X 20 5/8" height

8"W X 18"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 9.75"W X 19.75"H] Compatible with Duct 6" Priming the Pump: If required+ Product Details Size 8"w X 18"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 9. 75" width X 19. 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.