Easily label terminal blocks with our WSB QUICK MARKING SYSTEM. This white marker, part of the 209 series, features a snap-on design for quick and convenient installation. With a 5mm width, it provides clear and visible markings in black, perfect for horizontal numbering. Not only is it RoHS compliant, but it is also halogen-free and boasts a flammability rating of UL 94V-2, ensuring safety and environmental responsibility. Ideal for organizing and identifying connections in barrier strip jumpers, covers, and markers, as well as terminal blocks, this accessory is a must-have for efficient and compliant wire management.