Each Main tee has a white/black pre-painted white face, which matches our white cross tee, white wall angle and shadow line. The Main Tee is 38mm high, the face is 24mm wide and is a length of 3600mm. It is manufactured from high quality 0.4mm galvanized steel (Protection against corrosion of any kind). A reliable lock system, that when fitted together has a distinct click. Easily clicked into place and removed, with or without tools.