12" x 12" 4-WAY SUPPLY GRILLE - DUCT COVER & DIFFUSER - LOW NOISE - For Ceiling - With Opposing Damper Blades Copper Coil-Insulated Line Set + Product Details Size -

+ Product Details Size - 8"w X 28"h is the size for the duct opening measurement only

and waste gases transmission lines

+ Product Details Size - 20"w X 36"h is the size for the duct opening measurement only

3/4” - 2981 PSI

+ Product Details High Quality - Aluminum housing on the outside and on the inside for the best insulation value

12" x 12" 4-WAY SUPPLY GRILLE - DUCT COVER & DIFFUSER - LOW NOISE - For Ceiling - With Opposing Damper Blades Copper Coil-Insulated Line Set + Product Details Size -+ Product Details Size 12" X 12" 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