Rubber Molded Dummy Connector - 5 Pin Male RMK-5-MPD The RM rubber molded series is a connector used for underwater applications. The mold of the connectors is made from vulcanized neoprene that makes for a durable water tight seal. Each contact can be used on 600 volt and is capable of transferring at least 12 ampere. The dummy is used for protecting the connector and the contacts when there is nothing attached to the connector.