Euro style BMX bottom bracket 1.37` x 24tpi - 19mm spindle Includes LH and RH threaded cups, 4 precision sealed bearings, 2 alloy cone spacers, alloy internal spacer, and 4 steel crank arm spacers for a perfect fit and chainline 100% CNC machined 6061-t6 cups, cones and tube 5.5oz 68mm ENG 19mm AL6061 5.5oz Black