The Chris King AeroSet upper cup and bearing combines seamless design and legendary quality in an external upper cup that is built with precision and equipped with their exclusive built-in-house bearings. External upper cup is built with precision using premium aluminum Legendary made-in-house bearings provide uncompromising smoothness and longevity Engineered, manufactured and assembled in Portland, OR For use with Chris King AeroSet headsets ONLY Item Specifications Bearing Type Cartridge Color Gold Material Aluminum Chris King AeroSet Headset Upper Cup and Bearing Headset Upper UPC: 841529278873 MPN: PHS624Y2