Porelon 11473 Adler Royal Alpha 600 Compatible Correctable Mylar Typewriter Ribbon, Replaces XC001, 013045, 250, 901250, 911250, 2 Pack Typewriter Vivid and consistent color - Black, Exceptional light fastness and durable impressions Replaces manufacturers part #'s XC001, 013045, 250, 901250, 911250, and HYC01 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