10" x 10" 4-WAY SUPPLY GRILLE - DUCT COVER & DIFFUSER - LOW NOISE - For Ceiling - With Opposing Damper Blades Filter Grille + Product Details Size -

+ Product Details Size - 4"w X 36"h is the size for the duct opening measurement only

+ Product Details Size – 18"w X 22"h is the size for the duct opening measurement only

Actual Filter Size – 33 3/4"w x 17 3/4" x 1"

+ Product Details Size - 30"w X 14"h is the size for the duct opening measurement only

Actual Filter Size – 23 3/4"w x 29 3/4" x 1"

10" x 10" 4-WAY SUPPLY GRILLE - DUCT COVER & DIFFUSER - LOW NOISE - For Ceiling - With Opposing Damper Blades Filter Grille + Product Details Size -+ Product Details Size 10" X 10" 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