CGT4U - 

Insertion Bridge, For Middle and Bottom Level, Color of the Insulating Material Gray

Standard terminal blocks feature a universal foot for mounting on 35 mm or 32 mm DIN Rail. Ground Blocks are designed for either 35 or 32 mm rail. High-density design features screw-cage clamps for reliable connections. Material: Polyamide 6.6. Ratings: 600 V or 300 V. UL, CSA, IEC/VDE.
Use ground blocks instead of grounding studs and wire lugs to terminate ground wires, saving installation and wiring time. Ground blocks clamp mechanically onto the DIN Rail by tightening the center mounting screw, making a reliable electrical connection between the cage clamp terminals and the DIN Rail. The rail serves as a busbar and automatically distributes ground potential to all other ground terminals on the same rail.