Porelon 11640 Genicom 3800/3930/3940 Compatible Nylon Printer Ribbon, Replaces Manufacturers Part # 3A0100B02, 1 Pack Vivid and consistent color - Black, Exceptional light fastness and durable impressions Replaces manufacturers part # 3A0100B02 Compatible nylon printer 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