Permanent Polyester (B-423) is ideal for component identification, barcode 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. Service temperature of -94 to 230° F (-70 to 110° C). Brady B423 is UL Recognized for Outdoor Use on glass, thermoset polyester plastic and polyvinyl fluoride plastic surfaces to support solar panel identification applications.br. Brady Authentic materials work seamlessly with Brady printers for improved printer and material communication, seamless mobile app interaction, and better performance and reliability. A ribbon is required to print this material. Use Part Number M61-R6010 for the M610 / BMP61 / M611 Label Printers or M7-R6000 for the M710 / BMP71 Label Printers.