One year (12 months) warranty from date of purchase This ribbon provides vivid and consistent black and red color in addition to exceptional light fastness and durable impressions. This product has been designed and manufactured to operate the original equipment identified, and will not void your equipment warranty. 1 pack Porelon specializes in creating inking products and elastomers for a wide variety of industries. China Hot Sale Ribbon Manufacturers, Suppliers, Factory - Custom Hot Sale Ribbon Wholesale - TIANBO RB-2 Ribbon Porelon 11209 Universal Twin Spool Compatible Calculator Ribbon Replaces Manufacturers Parts M 310 Rb 2 013091 1 Pack 5e12bf2e 8a5e 4f08 Aae0 142f466d29aa.07d267bb8a7d92697a2990309183d49c Replaces M-310 RB-2 Ribbon This product has been designed and manufactured to operate the original equipment identified, and will not void your equipment warranty. Wide Compatibility: Compatible with several manufacturers including parts M-310, RB-2, and 013091, this ribbon is versatile enough to suit most standard calculators Replaces manufacturers part #s M-310, RB-2, 013091 , Compatible calculator ribbon. Vivid and consistent colors - Black and Red, Exceptional light fastness and durable impressions