8 pcs. (2x4). Heads toothbrush Carolina Meyer®. Oral B Precision Clean / Flexisoft (EB17-4) Spare replacement compatible. Fully compatible with the following models of electric toothbrushes Oral-B Vitality Precision Clean, Vitality Floss Action, Vitality Sensitive, Vitality Pro White, Vitality Dual Clean, Vitality White and Clean, Professional Care Triumph, Advance Power, TriZone and Smart Series.