This is Maclan Ceramic Lightning Series Motor Bearing Set (2 pcs) by Boca Bearings. These bearings have ceramic balls, with stainless steel races, retainers and shields.
- Fits Maclan DRK and MRR V1, V2, V2m, V4 & V4m (2-Pole) motors
- ABEC#5 rating
- Ball material: CERAMIC SI3N4
- Comes with zero grease, works with zero grease
- Works best with Maclan Lightning Lube (by Boca Bearings)