Available in 8 Shell Sizes / 27 Insert Arrangements. The ecomate? RSSM (Rugged Superior Seal Metal) Series of circular, metal connectors provides an IP69K rating (in mated condition) for industrial applications. With a bayonet coupling system and a maximum current rating range of 7A to 45A/600V, the ecomate? RSSM Series is perfect for indoor/Outdoor applications.