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

+ Product Details Size - The listed 10" diameter refers specifically to the size of the duct opening

These are specially sized to fit into all drop ceilings

guaranteeing efficient ventilation throughout your space

will last forever & never rust

Insulation – A thick blanket of fiberglass insulation provides you with an R-Value of 4

12" x 12" 4-WAY SUPPLY GRILLE - DUCT COVER & DIFFUSER - LOW NOISE - For Ceiling - With Opposing Damper Blades 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