12" x 12" 3-WAY SUPPLY GRILLE - DUCT COVER & DIFFUSER - LOW NOISE - For Ceiling - With Opposing Damper Blades Material_Steel Solid Base for Stability –

Solid Base for Stability – Built with a solid base for reliable mounting and stability

Actual Filter Size – 17 3/4"w x 25 3/4" x 1"

with actual outer dimensions of 18

actual front end outer dimensions are approximately 36 5/8" width X 16 5/8" height

provide precise damper control and superior air dispersion

12" x 12" 3-WAY SUPPLY GRILLE - DUCT COVER & DIFFUSER - LOW NOISE - For Ceiling - With Opposing Damper Blades Material_Steel Solid Base for Stability –+ 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