A durable cromoly steel cog, for all English-threaded track hubs (i.e. probably yours, you'd know if it wasn't).
1.37" x 24 tpi
For 1/8" chains only
Lockring sold separately. The Bassi cromoly lockring is an excellent match in both colour and quality.
Orders over a minimum threshold ship for free within Canada, with a flat rate for smaller orders. International orders are calculated, and US orders will have tariffs applied in the cart as a line item.