SW-Series Medium – High Capacity Rocker SwitchesMedium - High Capactiy Rocker Switches 15-30A Power Level; Frame Mount, UL, CSA, cULus, VDE Constructed of sturdy, high-performance materials including a zinc-plated steel mounting plate. Contacts are made of specially alloyed silver, providing superior arc resistance, mechanical stability, and long electrical and mechanical life. UL recognized and CSA certified