4" X 12" Brass Victorian Floor Register Grille - Modern Contempo Decorative Grate - HVAC Vent Duct Cover - Brass Plated Fixed Blades + Product Details Size –

+ Product Details Size – 8" x 24" or 24" x 8" is the size for the duct opening measurement only

Insulation density is 30kgs/cbm = 0

This simple adjustment reduces HVAC strain

Great emphasis has been invested in the design of this product to prevent it from kinking in sharp bends & turns and to hold steady and at full diameter in all applications

+ Product Details Size – 30"w X 8"h is the size for the duct opening measurement only

4" X 12" Brass Victorian Floor Register Grille - Modern Contempo Decorative Grate - HVAC Vent Duct Cover - Brass Plated Fixed Blades + Product Details Size –4" X 12" Is The Size For The Duct Opening (floor vent hole) Measurement Only, Actual Front End Outer Dimensions Are 5. 5" X 13. 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 12" Brass