Label Printer Ribbon, Compatible Grainger Part Number 22NA72, Compatible Mfr Part Number BBP72-34L, BBP81, Printer Series Compatibility BBP72, BBP81, i7100, THT 3 In. Core Printers, Ribbon Color Black, Ribbon Format Ribbon on Open Core, Ribbon Length 984 ft, Ribbon Width 6 7/8 in, Ribbon Series R4900, Ribbon Formulation Resin, Core Diameter 1 in, Product Type Single Color Thermal Transfer Ribbon, Resistance Properties High Temperature-Resistant, Smear-Resistant, Solvent-Resistant