The Rant Bang Ur Spanish BB includes 2 precision sealed cartridge bearings. 2 CNC machined 6061 aluminum cone spacers for a clean look, aluminum internal spacer, 4 steel crank arm spacers for dialing in your chain alignment. – Size: 19mm or 22mm – Sealed cartridge bearings – 100% CNC 6061-T6 alloy cones – Include spacers for custom fit – Weight: 3.8 oz.