Through-Bore Slip Ring for reliable rotary power & signal transmission ECN100-03P3-09P1 is CENO hollow shaft through bore slip ring with aluminum alloy housing for industrial rotary power & signal transmission. Designed with a large central through hole, it allows shafts, air tubes and cables to pass through the center, saving installation space for rotating equipment. Adopting precious metal contact structure, it realizes infinite 360° rotation without wire tangling, stably