8" x 8" 3-WAY SUPPLY GRILLE - DUCT COVER & DIFFUSER - LOW NOISE - For Ceiling - With Opposing Damper Blades Filter Grille + Product Details Size -

+ Product Details Size - 40"w X 20"h is the size for the duct opening measurement only

this 4-way air vent diffuser allows you to precisely control airflow

HVAC Premium - A Brand You Can Trust

actual front end outer dimensions are approximately 14 5/8" width X 12 5/8" height

8" x 8" 3-WAY SUPPLY GRILLE - DUCT COVER & DIFFUSER - LOW NOISE - For Ceiling - With Opposing Damper Blades Filter Grille + Product Details Size -+ Product Details Size 8" X 8" is the size for the duct opening measurement only, actual front end outer dimensions are 3". Design Equipped with lever for full airflow control; back blades made of black plastic for reduced air noise and discreet appearance; "Opposing" back blades, ensuring they don't overlap, provide precise damper control and superior air dispersion. High Quality Aluminum The premium durable aluminum will never rust and it will never