Label Printer Ribbon, Compatible Mfr Part Number BBP11, BBP12-US, THT 1 In. Core Printers, Printer Series Compatibility BBP11, BBP12, THT 1 In. Core Printers, Ribbon Color Black, Ribbon Format Ribbon on Open Core, Ribbon Length 242 ft, Ribbon Width 4 in, Ribbon Series R4900, Ribbon Formulation Resin, Core Diameter 1/2 in, Product Type Single Color Thermal Transfer Ribbon, Resistance Properties High Temperature-Resistant, Smear-Resistant, Solvent-Resistant