Air diffuser ,there are various type ,such as Jet diffuser , Swirl diffuser,Air grilles etc. Main material is aluminum with perfect appearance .Our air diffuser can be installed in the celing ,wall,floor to satiafied with customer’s different requirements . We will have new products evry two months . We persist to pursue new technical and products.Variable Swirl Diffusers Adopts Hydro-kinetics Principle for the Design of its Blade.