The 04.326.2153.8 is a yellow marking cover with marking facility designed for use with Wieland Electric terminal block systems. This accessory is specifically engineered to provide clear identification and labeling capabilities on single power line cross connectors and distribution terminal blocks. The cover features a bright yellow color for high visibility and includes integrated marking facility to allow custom labeling of electrical connections. It is compatible with various terminal block configurations and is supplied in standard packs of 10 units. This marking cover is essential for industrial control panels, electrical distribution systems, and complex wiring installations where clear circuit identification is critical for safety, maintenance, and troubleshooting.