B-423 WorkHorse Series Harsh Environment Labels are polyester thermal transfer labels intended for use in a variety of applications, including electronic PCB and component identification, bar code labelling, rating plates and solar panel identification. When printed with Brady R6000 Series Halogen Free ribbon, this material is UL Recognized and CSA Accepted. In addition, when printed with the correct ribbon, this material meets the requirements of halogen-free material per DIN VDE 0472 part 815.