6" x 6" - 1-Way Extruded Aluminum Ceiling Diffuser Square - HVAC Vent Cover w18h18 3 * insulation density is

3 * insulation density is 30kgs/cbm = 0

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+ Product Details Size – 20"w X 50"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 18 5/8" width X 34 5/8" height

6" x 6" - 1-Way Extruded Aluminum Ceiling Diffuser Square - HVAC Vent Cover w18h18 3 * insulation density is+ Product Details Size 6" X 6" 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 never