4" X 10" Brass Victorian Floor Register Grille - Modern Contempo Decorative Grate - HVAC Vent Duct Cover - Brass Plated Fixed Blades 3 * Insulation density is

3 * Insulation density is 30kgs/CBM = 0

while the ingenious dial-controlled damper empowers you to effortlessly regulate airflow using your foot

9% Pure Copper meeting ASTM B280 standards

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4" X 10" Brass Victorian Floor Register Grille - Modern Contempo Decorative Grate - HVAC Vent Duct Cover - Brass Plated Fixed Blades 3 * Insulation density is4" X 10" Is The Size For The Duct Opening (floor vent hole) Measurement Only, Actual Front End Outer Dimensions Are 5. 5" X 11. 5" SEE BELOW IN DESCRIPTION HOW TO MEASURE A GRILLE Solid Rigid Steel Body For Durability and Reliability Premium Plated Finish and Modern Contempo Design Forming a Luxurious Piece Carefully Shrink Wrapped With Cardboard Backing To Prevent Damage In Shipment Easy Unrestricted Air Flow For Your HVAC System 4" X 10" Brass