b's b r i e i f e T i m e h i n g l e e m n l iColor Shown:Pewter Grays l T**U.S. only* StainGuard algae protection is available only on shingles sold in packages bearing the StainGuard logo. Products with StainGuard algae protection are covered by a 10-year limited warranty against blue-green algae discoloration.See GAF Shingle & Accessory Ltd. Warranty for complete coverage and restrictions.Note: It is difficult to reproduce the color clarity and actual color blends of these products. Before selecting your color, please ask to see several full-size shingles.12'