WAGO's 209-502 WSB quick marking system provides a simple and efficient solution for identifying terminal blocks. Designed for horizontal marking, these strips feature consecutive numbers (1-10, repeated 10 times) and are suitable for terminal block widths ranging from 5 to 17.5 mm. The white color and clear numbering enhance readability and organization in industrial control panels and electrical enclosures. This system is ideal for maintaining clear and consistent labeling, reducing errors, and improving overall system efficiency.