Inner boxes are produced in eight basic variants. All walls are either hot-dip galvanized or sandblasted and subsequently finished with baked comaxite paint according to RAL shades. The dimensions of the walls are made according to the client’s requirements, while the height of the walls is usually 2.20m and the distance between the pipes is 53mm. It is also possible to meet special requirements and produce walls of other shapes based on documentation supplied by the customer.