U Fitting For 3-1/4″ Channel Height – Electro-Galvanized are U-Shaped Connectors that join perpendicular channels that are stacked on top of each other. These connectors fit FS-100 or FS-201 Strut Channel Use Like Metal Hardware for your application so the material lasts up to its optimal timeline. Electro-Galvanized Steel should be used in interior applications where conditions are dry, and humidity is low.