Porelon 11424 IBM Actionwriter I/Adler Sat III Compatible Correctable Typewriter Mylar Ribbon, Replaces #'s 901246, 1361190, 911246, 1 Pack Vivid and consistent color - Black, Exceptional light fastness and durable impressions Replaces manufacturers part #'s 901246, 1361190, 911246, and 013038 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