Replacement bearing kits for Campagnolo Ultra-Torque bottom brackets.
These are supplied in three qualities:

CULT (Ceramic Ultimate Level Technology) are Hybrid Ceramic bearings for use with all Ultra-Torque cups.
USB (Ultra Smooth Bearings) are Hybrid Ceramic bearings for use with all Ultra-Torque cups.
Steel, for use with all Ultra-Torque cups.

Please note: You can upgrade your Ultra-Torque bottom bracket to either Hybrid Ceramic option.