Refilings - 2 pcs Oclean replacement brush heads per pack, compatible with all Oclean electric handles, CE and FDA approved. The innovative Ultra Series brush heads with FlexFit tech guarantee gentle deep cleaning for a uniquely clean feeling, even in those hard-to-reach areas. Soft rubber links the brush rod and head, cleaning tooth surfaces and hard-to-reach areas flexibly, deeply and compactly. Exceptional Plaque Removal - Reduce 40% more plaque and +20% Resilience Bristles*. FlexFit Tech - Soft rubber links the brush rod and head, ensuring the optimal interdental clean with the best in motion fitting, while providing the excellent teeth protection through the shock-absorbing rubber coating. Innovative 5° Design - Deep clean below the gum line and hard-to-reach areas. DuPont™ - The unique bristles design and combination are coordinated with the functional mechanism of the motor, contributing to an exceptional and comfortable cleaning experience and better plaque removal. Delicate Tongue Cleaner - Special and delicate tongue cleaner design for fresher breath every day. They remove up to 9x more plaque than a manual toothbrush. Replace brush heads - Replace the brush head every 2-3 months as recommended by a professional dentist. Bristle firmness: Firm. * vs. Oclean Professional Clean brush head