These cogs are made to put on an electric motor and have a one-way grab and fit with a 1/4″ chain.
The two pictures show this cog relative to a “standard” bicycle cog.
I have moved on to a different system of E-bike, so these are now surplus in my world.
I have 2 of these to move on to any individual who can use them, in some way I will not find the button to show to be had quantity as a couple of… This listing is for only one, but the other will be listed right away after this one sells.
These have mild “shop-wear”, have never been used, and cost much more new!
I will ship, at cost, by no matter what service you prefer.