This is a really nice paul track hub. One side is threaded for a freewheel, the other for a track cog. A flip-flop hub! 130mm O.L.D., 32 holes, black anodized. Retail is $214. Please note that the bearings are a lil' scratchy-- you may want to regrease or replace them, but it'd build up fine into a bike polo wheel! Let me know if you're interested!