Label Printer Ribbon Cartridge, Compatible Grainger Part Number 52HJ91, Compatible Mfr Part Number BMP61, M611-AM-BT-W, Printer Series Compatibility BMP61, M611, Ribbon Color Black, Ribbon Format Ribbon in Printer Specific Cartridge, Ribbon Length 75 ft, Ribbon Width 2 in, Ribbon Series R4300, Ribbon Formulation Wax/Resin, Product Type Single Color Thermal Transfer Ribbon, Resistance Properties Smear-Resistant, Solvent-Resistant, Weather-Resistant, Standards RoHS Compliance WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov -