Miniature Slip Ring Connector, 22mm, 2-36 Wires, 2A/5A/10A/30A | ATO.com
Miniature Slip Ring - 12mm diameter, 12 wires, max 240V @ 2A : ID 1195 : $24.95 : Adafruit Industries, Unique & fun DIY electronics and kits
SparkFun Slip Ring - 12 Wire (2A) - RobotShop
What's the difference between electric and fiber-optic slip rings?
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