Marine Protection Systems™ Aluminum Earthing Ground Plate Kit 12" x 5". Purpose-built grounding for marine applications provide a reliable underwater AC ground point critical for onboard electrical system safety. Ensuring safe AC protection to support effective GFCI/RCD operations & fault dissipation. Also appropriate for radio grounding and lightning plate operations. Aluminum plates for aluminum running gear: outdrives, outboards and pod drive systems. Includes multiple fastener lengths and necessary hardware for most hull types and installation requirements.