The Weidmuller DEKAFIX FS 5 MKD 801-850 is a vertical marking system designed for organizing and clearly identifying terminal blocks in electrical installations. This durable marking solution enhances efficiency and supports streamlined installation processes in demanding environments.This product is a vertical marking system for terminal blocks. It is compatible with FS terminal blocks and designed for clear identification and organization within electrical systems. The system is constructed for durability in demanding environments.