12" x 12" 4-WAY SUPPLY GRILLE - DUCT COVER & DIFFUSER - LOW NOISE - For Ceiling - With Opposing Damper Blades Copper Coil-Insulated Line Set and waste gases transmission lines

and waste gases transmission lines

actual front end outer dimensions are approximately 16 5/8" width X 10 5/8" height -

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

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12" x 12" 4-WAY SUPPLY GRILLE - DUCT COVER & DIFFUSER - LOW NOISE - For Ceiling - With Opposing Damper Blades Copper Coil-Insulated Line Set and waste gases transmission lines+ 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