• This product is compatible with Y Toothbrush and Sonic 3000 models.
• 2-Pack Perio Replacement Heads
• Highest Quality Dupont Bristles
• Patented Angled Brush Heads 
• Perio Brush head is made of ultrasoft bristles (white) outside and cleaning bristles (green) inside. Made for polishing off stains from the surface of teeth while massaging the gums.
• Suggested replacement time: every 3 months.