Double flush-mounted device box with airtight membrane inlets, for use in masonry with an installation depth of at least 67 mm. . With 4 connectable connecting pieces with bayonet lock . 4 combination pipe inlets 20 and 25 mm . 4 inlets up to 20 mm . 14 inlets up to 11 mm . 2 inlets up to 20 mm in the floor
