16 pcs. (4x4) of brush heads to E-Cron® teeth. Replacement Oral B Precision Clean / Flexisoft (EB17-4). 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 .
It is only with brushes. I feel they wear out a little faster than the official brush, but nothing dramatic either. They work well with my Oral B tooth brush