Sugino Gigas Track Cog - 12T (NJS)

The rare 12 Tooth keirin track racing cog from Sugino.
This is part of the GIGAS series of pro-racing track cogs, but is cheaper than the 13T through 16T versions, due to it being made of cromoly rather than S3 coated alloy.
Made In Japan. NJS certified and stamped, for use in professional Keirin racing.
Note: To use this cog, you will also need a Sugino 12T-specific lockring. The cog is so small, that the chain will rub on the lockring, if you use a regular track lockring.