Air Diffuser Material:Metal(aluminium steel ect) Finish:powder coating Size&Color can be adjusted with customers' request Air DiffuserSupply or return air applications.Complete ... /Service (We Sell):Air grille,air diffuser,egg crate grille,air damper,return air grille,air vent,ceiling diffuser,air inlet,air outlet,aluminum grille,aluminum diffuser Number of Employees ...