Products Home/Dampers/Back Draft Dampers Product Categories Aluminium Eggcrates Ceiling Diffusers Grilles Swirls Linears Jet Diffusers Floor Diffusers Weather Louvres Plastic Grilles Supply Air and Plenums Fire Damper Dampers Zoning Accessories Backdraft damper is made of galvanized steel body with aluminium blade. Size available: D100 D125 D200 D250 D300