-For use with FBM, S&M or Fit compatable Mid bottom bracket frames. 19mm Fits Profile BMX, DJ, Odyssey cranks or others with a 19mm spindle and the 22mm version will fit Primo Powerbite, Hollowbite or Excel, Snafu, Mosh or others with a 22mm spindle. Sold as a pair and includes internal sleeve bearing spacer and cone spacers. Weight: 7ozs..