1.AL 6063. 2.Surface: Satinless steel look, matt silver raw, no anodized 3.For 12.76-21.52mm glass 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 Aluminum Glass Channel 12.76-21.52mm