ECF504-6S is an exclusive line of category 3 panel mount connectors is the perfect choice for passing modular cables through a rack panel or wall plate. The unique flange mount design accepts #4 or #5 screws for secure mounting of these couples to any panel. Contacts have 30 micro inches of gold plating for durability and the ivory plastic shell is UL94V-0 rated. With a category 3 rating these couplers can be used for either voice or data applications.