"BRT-7T" Electric Toothbrush, Dedicated Replacement Brush for Hapika, Childrens Soft 2 Pieces (BRT-7T) is a replacement brush for kids that is gentle on teeth and gums.With an elongated neck and compact head (80% minimum) you can clean up every corner.The hair is rooted using DuPont high-grade nylon "TYNEX".Rounded bristles prevent damage to teeth and teeth.This is a replacement brush that can be used in common with all models of the Hapika series of electric toothbrushes.The bristles are soft.