This SRH3899-6P/12S Slip ring is the small through bore slip ring which has max 6Circuits

Mechanical parameters
Plastic or AL housing
through bore dia:38mm
out dia 99mm
lead wire length: 250mm(options)

Electric performance

max 6 Circuits
Power: 10/Circuit,15A/circuits,
Signal: 2A/Circuits
speed:0-250rpm
insulation resistance:500MOhm/500V DC
Dielectric strength: 500V AC @50HZ 60S
Electric noise: � 0.01Ω
life: 10million rpm
operation temperature: -20°c--+80°c
operation humidity: 60%RH @ 40°c
contact material:Precious metal
IP51

options:
ring number. min 2 rings, max 48 rings.
IP Grade, IP51 IP54 IP65 IP67
wire length: standard 250mm, customer can define the lenght of the cable.
shrink tube protect the wires.
Ethernet CAT5e
Can bus