Connector housing. HDC housing, size: 4, protection class: IP 68, base housing, screw closure, standard, cable entry size: M 32. The new seawater-resistant and highly impact-resistant RockStar® housings in IP68 and IP69K are designed for use in extreme environmental conditions and are built to meet the high vibration requirements according to DIN EN 61373 Category 2 (bogie). This housing family is therefore ideally suited for trouble-free and maintenance-free operation of heavy connectors in transportation and traffic engineering, as well as in energy technology and applications with extreme requirements.