Glass channel: 1.AL 6063. 2.Surface: Satinless steel look, Matt silver, Raw, no anodized 3.For 17.52 - 21.52mm Aluminium Glass Channel: 1, Avaliable for wall and floor installations2, Multiple selection of the surface treatment3. Quick & Easy Installation 4.Fresh new look in the office & home 5.Have more economical choice "Light" AL Glass Channel-Top 17.52-21.52mm