Label and Ribbon Cartridge Compatible Grainger Part Number 20XX01 20XX02 20XX04 21U174 21U176 21U177 21U178 21U179 21U180 29YJ26 810HX3 810HX4 Compatible Mfr Part Number BMP41 BMP51 M511 M511-KIT Label Color White Label Finish Matte Label Height Not Applicable Label Material Polyester Label Width 1/4 in Printer Series Compatibility BMP41 BMP51 M511 Ribbon Color Black Roll Length 12 ft Vial/Tube Size Not Applicable