Taidacent Hollow Slip Ring Rotary Electrical Contact 2/4/6/12 Wires Collector Ring Conductive Electric Motor Slip Ring Rotating Connector (6 Wires 10A Inner Hole 12.7mm OD 54mm) - - Amazon.com
Electric slip rings: 5 things to know about brushes, voltage drops, and noise mitigation
SR012 Low Voltage Slip Ring Separates by Rotary Systems, Inc.
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