SZ Wall mounting bracket for KS, sheet steel, galvanized, Wall distance 15 mm, Wall mounting bracket for AE/WM, Carbon steel, Zinc-plated, Wall bracket pre-fitted with seal and expandable dowel., 83025000, 4 pc(s), 0.556 lbs, 4028177602366, For external mounting of the housing. Simply insert the expandable dowel into the housing hole from the outside, and screw-fasten the wall bracket from the outside.