Typically, it is comprised of a stationary graphite or metal contact (brush) which rubs on the outside diameter of a rotating metal ring. As the metal ring turns, the electrical current or signal is conducted through the stationary brush to the metal ring making the connection. Additional ringbrush assemblies are stacked along with rotating axis if more than one electrical circuit is needed. When the search comes to Slip ring Unit, we are the leaders of market for manufacturing high quality Slip ring Unit