Fuliko BJADE' 12x6 Inch Air Vent Cover Grille Linear Slot Diffuser, 3 Slot HVAC Standard Linear Slot Diffuser Register Grille for Ceiling, Walls, Floo

No Edges:The HVAC Vent Duct Cover made of Aluminum will Never Rust, smooth surface, no edges. with your decoration Air For HVAC: Modify air volume and direction by each slot, optimal airflow with minimal noise. Sidewall Ceiling Grille: Suitable for wall ceiling installations. Can be employed as supply vent cover and return vent cover. To Install: linear slot diffuser can be mounted the side or the back, screws included in the package Size: Suitable for the air duct/drywall opening size of 12" 6"