The WAGO part 209-503 is a WSB marking card designed to provide clear and organized labeling for your electrical connections. This marking card is in the form of a white as card with a horizontal marking, ensuring visibility and easy identification. The card is marked from 11 to 20 (10x), allowing for efficient labeling of numerous connections. Its snap-on type design allows for effortless installation, while the non-stretchable material ensures durability and long-lasting performance. Whether you're working on industrial or residential projects, this WAGO marking card is an essential tool for maintaining an organized and efficient electrical system.