These are the 12x18x4mm ball bearings for the HPI R40 touring car. These bearings are used in the rear bulkhead set.
Features: Shielded steel construction for long life
Includes: Two 12x18x4mm Ball Bearings for the HPI R40 touring car rear bulkhead or any application requiring a 12x18x4mm bearing
Requires: Installing in bulkhead
Outer Diameter: 18mm
Inner Diameter: 12mm