8 pcs. (2x4) of brush heads to E-Cron® teeth. Oral B Precision Clean Replacement (EB417-4). Fully compatible with electric toothbrushes Oral-B models: Vitality Precision Clean, Vitality Floss Action, Vitality Sensitive, Vitality Pro White, Vitality Precision Clean, Vitality White & Clean, Professional Care Triumph Advance Power, Trizone and Smart Series .
I tried a first brush: the time until the brush is recharging is shortened (compared to manufacturer's brushes), I had the feeling that the brush was struggling to be driven. I sprayed some lubricant to the brush head and now it works correctly. Stil