Porelon 11476 Universal Twin Spool Compatible Nylon Typewriter Ribbon, Replaces Parts for Adler, Brother, Olivetti, Smith Corona, 1 Pack Vivid and consistent colors - Black and White, Exceptional light fastness and durable impressions Replaces manufacturers parts for Adler, Brother, Olivetti, Olympia, Royal, Sears, Silver Reed, Smith Corona and Swintec Compatible typewriter nylon 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