Roll Valley, Size 6", 8", 10", 12", 14", 20" x 10' of 50' Long, 28 or 26 ga Galvanized Steel or Painted, Aluminum. Roll Valley is rust-resistant flashing that can be bent, cut and shaped for many weatherproofing projects. This product is used to make custom flashings, for commercial or residential use. For architectural, residential, and commercial roofing. ASTM A-653, ASTM A-792 (for Steel)