1:Product Summary:aluminum frame+aluminum meshes+plastic lock button 2:Specification:398.5*178*8mm 3:Outer Frame Material:silvery white alumina. 4:Filtration Mesh Material:stainless steel face meshes+2layers aluminum meshes 5:Lock Button:glide pattern plastic lock button. 6:Application: A)Used for any kinds of european range hood. B)Other kinds of range hood of low resistance and ventilative,cleaning system.