Beconfident® Sonic Whitening & Regular brush head replacement kits. Available in Twin-pack, Quattro-pack and Mix-packs. USP & Claims: n Dedicated Whitening brush head especially made for stain removal n Regular brush head for soft / medium brushing n DuPont bristles with fade-away brush head replacement reminder n Tested brush technology for improved and safe tooth cleaning n Available in 2-pack, 4-pack and Mix-pack (2+2). Black or white. Quality Dupont bristles in the Beconfident® Brush heads For careful brushing we use DuPont® rounded bristles in all our brush heads. The Regular brush head has 34 brush holes with 816-918 bristles in diameter 0.152 mm. Its reduced number of bristles deliver gentle yet effective cleaning along the gum line, where gum disease starts. It's clinically proven to deliver up to 100% less gum inflammation and up to 7x healthier gums in just two weeks. The Whitening brush head has only 14 holes, but with 24 bristles per hole adding up to 1232-1302 bristles. This is about 50% more bristles than the regular head, so it’s more densely packed for optimal stain removal. It is clinically proven that the Sonic technology is removing up to 100% more stains in just three days than a regular brush. Both has built in Pedex color reminder which fades color after 90 days of twice daily use. It is recommended to switch brush head every quarter for best results and hygiene.