Inlet openings made of flexible material. The instalation of the cable is done by pulling the pre-pressed inlet on the flexible membranes and inserting the cable or pipe into the hole formed. Installation box in the hole is made by tightening mounting screws. Air proofed even with inserted cable or pipe. Suitable for low energy and passive houses. The fixing screws as well as the instrument screws are double-threaded for quick installation; the box has plastic flanges. When mounting, it is not necessary to countersink the plasterboard edge. The IP30 protection a box fitted with an appropriate lid or a device with a higher or equal IP30 protection. Protected by a European industrial design trademark.