Satin Anodized Aluminum Channels are stocked in 12 ft., 6 ft. and 4 ft. lengths. Many are also available in 24 ft., 12 ft., 8 ft., 6 ft. and 4 ft. lengths.Our Anodized Aluminum Angle are stocked in 12 ft., 6 ft. and 4 ft. lengths, with many also available in 24 ft., 12 ft., 8 ft., 6 ft. and 4 ft. lengths. Our anodized aluminum angle extrusions are available in a variety of finishes and thicknesses