M20 model is environmentally sealed rotary contact assemblies are the high performance electrical link between stationary and rotating components. Their inherent characteristics of low and stable resistance (low noise), and high current handling capabilities make them ideally suited to carry both power and control signals within the same assembly. Unlike conventional slip ring designs which rely on sliding, wear prone, solid metal to metal contacts, all models use environmentally sealed rotary metal film contacts which are inherently arc-free, maintenance free and explosion proof