PLF Write On Cable Ties Panduit PLF Write On Cable Ties are constructed of natural nylon material for indoor use and are weather-resistant for outdoor use. The flame-retardant material has a flammability rating of UL 94V-0 for indoor use, and the one-piece construction is designed for consistent performance and reliability. These flag ties can be marked with Panduit marker pins or computer printable labels and are used to fasten and identify bundles at the same time. Panduit PLF Write On Cable Ties feature a curved tip that is easy to pick up from flat surfaces and allows faster initial threading to speed installation.