Introducing the WSB QUICK MARKING SYSTEM ( 209-727), designed for efficient organization and labeling in electrical applications. This white marker, part of the 209 series, features a snap-on mating type for easy installation. With a non-stretchable construction and halogen-free composition, it ensures durability and safety. The black marking color, UL 94V-2 flammability rating, and 4mm width make it ideal for vertical numbering on barrier strips, terminal blocks, and connectors. Stay organized and compliant with the WSB QUICK MARKING SYSTEM.