Buried base, KVS, kit, size 3, 920 mm. Buried base with fastening rail made of angle steel 40 x 40 x 3 mm for clamps as strain relief for cables. Pre-punched opening on the side that can be closed from the inside. When opening, a cover d = 55 mm (accessory) must be installed. To prevent condensation, the base must be filled with base filler on the inside up to the height of the cable fastening rail.