The Brady PTPSL-20-422 are Permashield™ labels for the TLS 2200® & TLS-PC Link™ Thermal Transfer Portable Printers. A polyester label that comes with a separate overlaminate to be applied over the label once printed. Overlaminate is a clear polyester (B-966B) that extends 0.125" outside of label on each side when applied. Please Note: This material is UL & CSA approved with its respective ribbon. See the "Recommended Ribbon Series" for the appropriate ribbon to use.