The Halo ceramic series of bearings are a high quality steel/chrome bearing with metal shields and ceramic Si3N4 balls. This is the common bearing used in the Team Losi XXXNT clutches (these are non-flanged, standard for the Drake edition)

1/4 x 3/8 x 1/8 Halo bearing by Avid Racing Concepts is the standard bearing for nitro clutchs. Check your manual for the correct size for your vehicle if you are not certain.

• STANDARD: 0.25" (Inner) x 0.375" (Outer) x 0.125" (Width)
• FRACTION: 1/4" (Inner) x 3/8" (Outer) x 1/8" (Width)
• METRIC: 6.35mm (Inner) x 9.525mm (Outer) x 3.175mm (Width)