Square section flanges are used to secure square section tubing (by welding) to the fixable (4 attachment holes) flange surface.
Flanges are 100% hot dip galvanized.
MK Three Way Top Corner 15 NB (21.3mm OD)
Post without flange (50x50) - 1500mm - (use with landscape panel) - Hot Dipped Galvanized, powder coated or epoxy coated finish