types of sonicare toothbrush heads
ProResults Brush Head The ProResults brush heads have angled, radial trimmed bristles that are 10% wider angle than typical brush heads and are designed to squeeze around teeth better. They have standard and compact sizes. Sonicare Sensitive Brush Heads These come in Snap-On and Twist-On and have the same design as the ProResults brush heads, but are 25% softer so they are good for people predisposed to gum recession.
If your brush has two speeds, and uses brush heads with slim-angled necks, then you have a Sonicare Elite. An Elite toothbrush has a thread collar screw on brush head.