Brady, M21-750-423, 110898 0.75 inch x21 ft White BMP21 WorkHorse White Polyester Label. Permanent Polyester (B-423) is ideal for electronic PCB and component identification, bar code labels, rating plates and solar panel identification. Glossy white finish with permanent acrylic is thermal transfer printable. UL approved; CSA accepted. Meets requirements of a halogen-free material per DIN VDE 0472 part 815. All-in-one cartridge includes ribbon and label supply.