8" Circular Round Plastic HVAC Supply Grille Air Diffuser -Vent Duct Cover [Outer Dimensions: 10"] w20h20 Built-In Locking System – Comes

Built-In Locking System – Comes with a permanently attached eight-tumbler lock and a supplied key for added security

+ Product Details Size - 12"w X 36"h is the size for the duct opening measurement only

Actual Filter Size – 21 3/4"w x 7 3/4" x 1"

angle them down for effective warmth distribution

+ Product Details Size – 16" x 28" or 28" x 16" is the size for the duct opening measurement only

8" Circular Round Plastic HVAC Supply Grille Air Diffuser -Vent Duct Cover [Outer Dimensions: 10"] w20h20 Built-In Locking System – Comes+ Product Details Size 8" Diameter is the size for the duct opening measurement only, actual front end outer dimensions are 10" diameter. Design Made of strong durable ABS plastic, will last forever & never rust. Easy removal for cleaning. Airflow Improved airflow dynamics long neck bBody reduced noise design integrated spring fasteners. Easy Installation Just pop the diffuser right into the wall duct hole and the side springs will hold it right into