SZ Spacer, for TS roof plate, H: 10 mm, Spacer for roof plate, Hexagon steel section, Zinc-plated, Assembly components, 10 mm, 0.39 in, 73269098, 4 pc(s), 0.265 lbs, 4028177022775, For raising the roof for ventilation purposes, available in three different heights. Not suitable for crane transport.