Introducing the WSB QUICK MARKING SYSTEM, 209-739. This white marker, part of series 209, offers efficient labeling for terminal blocks and connectors. Designed for easy application, it features a snap-on mating type and a 4mm width, with vertical marking direction for clear visibility. The black marking color stands out against the white background, meeting UL 94V-2 flammability rating for safety. Non-stretchable and halogen-free, this marker is ideal for organizing and identifying connections in industrial settings. Perfect for Barrier Strip Jumpers, Covers & Markers, and Terminal Blocks, the WSB QUICK MARKING SYSTEM streamlines workflow and enhances organization.