The offer includes internal corrugated plastic trunking and ducting protecting electrical cables. They can be used as sleeves for surface and under-plaster installations - also those which are installed on the external walls of buildings and in fire hazardous rooms. Depending on the installation site and customer requirements, the systems are made from plastic materials including PVC, PVC UV, PP, PA, PC, PC/ABS, or LDPE. These systems are resistant to external conditions and mechanical damage. The internal corrugated installation sleeves protect electrical wires against moisture, corrosion and other factors. They are highly durable.