Slot diffusers |Wall and ceiling mounting | Ventilationland
Venti Air 12 in. x 12 in. Aluminum 4-Way Diffuser/Register/Grille for Air Supply HA4D12 - The Home Depot
Wall/Bulkhead Electronic VAV Diffusers - Elta Fans Asia
Grilles, Registers & Diffusers | Greenheck
Wall-mounted air diffuser - IBIS - SWEGON - linear / modular
HVAC Ventilation Aluminum Drum Shape Air Diffusers Wall Mounted Louver Adjustable Direction Blade Powder Coated - China Air Vent, Air Grill | Made-in-China.com