Cast-in channel (Halfen channel or embedded channel) is a C-shaped metal channel pre-embedded into the structure before concrete pouring, and serves as a core anchoring component for building electromechanical systems, curtain walls, utility tunnels and rail transit.

The product surface is treated with multi-layer protection including hot-dip galvanizing, powder coating and fireproof coating. It has passed a 6000-hour salt spray test, featuring excellent corrosion resistance with a service life of up to 100 years.