Precut Label Roll Cartridge Compatible Grainger Part Number 21U174 21U176 21U177 21U178 21U179 21U180 810HX3 810HX4 Compatible Mfr Part Number BMP51 BMP53 M511 Label Color Yellow Label Finish Gloss Label Height Not Applicable Label Material Reflective Tape Label Width 1 1/2 in Material Properties Retroreflective Printer Series Compatibility BMP51 BMP53 M511 Ribbon Color Black Roll Length 20 ft Vial/Tube Size Not Applicable For Print Method Thermal-Transfer