The Philips HX6052/88 replacement brush heads are designed for adults using Sonicare electric toothbrushes who need a gentler touch for sensitive teeth and gums. Each oval-shaped head features over 3,000 densely packed, extra-soft bristles that reach deep into hard-to-access areas to remove up to ten times more plaque than a manual toothbrush. These black brush heads are crafted from 70% bio-based plastic and come in recyclable paper packaging to reduce environmental impact. They fit all click-on handles within the Sonicare range and support BrushSync technology, which helps you track when it is time for a replacement. This pack includes 2 brush heads, providing a convenient supply for your daily oral care routine.