Products Home/Jet Diffusers/Multi Cone 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 Multi cone jet diffusers are made from spung aluminium. Available sizes: D200 D250 D300 D350 D400 D450 D500 Standard powder coating colour: RAL9010 and RAL9016, special colour is available upon request.