4" X 8" Floor Register with Louvered Design - Heavy Duty Rigid Floor Air Supply with Damper & Lever - Outer Dimensions [ 5.5 X 9.5] - Light Grey w22h22 + Product Details Size –

+ Product Details Size – Duct end cap is 18" X 8" | 26-gauge galvanized steel end cap

Applications – The straight boot is used for the transition from round pipe or insulated flex duct to register or grille

This Will Create A Cycle Of In And Out Air FLow

Unlike other covers

Pressure Rating – 2300 to 6500 PSI

4" X 8" Floor Register with Louvered Design - Heavy Duty Rigid Floor Air Supply with Damper & Lever - Outer Dimensions [ 5.5 X 9.5] - Light Grey w22h22 + Product Details Size –+ Product Details Size 4"w X 8"h or 8"w X 4"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 5. 5" X 9. 5" wider. High Quality Extra Heavy Duty to withstand constant walk on situations. Installation Location Floor. Design Rigid gauge built for durability and long life in mind, but still light and handy. Powder Coat Finish Smooth, shiny, scratch resistant, beautiful. Looks like it was just waxed.