... with individually adjustable 19" extrusions and all types of 19" active or passive equipment can be ... the frame bottom (utility height 41U), 1 pair of side panels with locks, 1 earthing kit, 4 ... .e. 2 shelves, utility height of each section 20U), 1 pair of side panels with locks, 1 earthing kit ... .e. 3 shelves, utility height of each section 13U), 1 pair of side panels with locks, 1 earthing kit ...