"Package of Twelve" Citizen IR-91 Ribbon, CBM910, CBM911, CBM920, IDP3110, IDP3111, MD910 and MD911 Ribbon, Purple, Compatible, Replaces Nu-kote NK505P Purple Nylon Ribbon Compatible Replacement For: Nu-kote NK505P, GRC E245 and Citizen IR91P Package of Twelve Swartz Ink refunds a portion of shipping when purchasing more than one 12 pack.