The Professional Clean brush heads can effectively and gently remove plaque for your daily routine needs. They feature certified bristles, a compact brush head design, and oral-safe materials. ·DuPont™ Bristles. The Professional Clean brush heads give you an exceptional cleaning experience and +30% better stains removal* with DuPont™ diamond bristles. *vs. a manual toothbrush ·Delicate Design - The W-shape brush head design with diamond bristled tip delivers better fitting, enhanced protection and maximum comfort. Delicate tongue cleaner for fresher breath. ·FDA Compliant Material. The Professional Clean brush heads are approved by FDA. Oral safe materials, meaning you can use them without any worries! ·Replacement Recommendation - Dental professionals recommend changing your brush head every 2-3 months. ·Compatible with all Oclean adult toothbrushes. Bristle firmness: Firm