Porelon 11478 Canon AP200/550 Compatible Correctable Mylar Typewriter Ribbon, Replaces Manufacturers Part # AP11, 1 Pack Vivid and consistent color - Black, Exceptional light fastness and durable impressions Replaces manufacturers part # AP11 Compatible typewriter mylar ribbon This product has been designed and manufactured to operate the original equipment identified, and will not void your equipment warranty. One year (12 months) warranty from date of purchase