"A slip ring is an electromechanical device that allows the transmission of power and electrical signals from a stationary to a rotating structure. A slip ring can be used in any electromechanical system that requires rotation while transmitting power or signals. Slip ring can improve mechanical performance, simplify system operation and eliminate damage-prone wires dangling from movable joints. 28AWG, ,UL, color Teflon, silver or tin plated 120,000,000rounds http://www.btslipring.com "