1.Ultimate type: 3700 heel bristles, tuft in tuft design, 16 °angle arrangement, professional cleaning gum line, crevices and other hard to reach areas

2.Gentle care type: 4000 bristles, a circle of super soft bristles on the outside, curved cutting of bristles, fitting tooth curve, suitable for sensitive teeth

An additional 4 brush heads, which are not from the Oral-B brand but of good quality,