CeramicSpeed Ceramic Crank Bearing Red 24 mm BSA?.

Fits e.g. with a Shimano crank set and can be used as a replacement for their Hollowtech II bearings.

CeramicSpeed makes some of the strongest, most accurate, and lightest rolling bearings on the market, they are all ceramic.

Ceramic bearings also provide better utilization of one's wattage.