Standard Soft Brush Head Refill

We’ve had quit for a while, but these seem to be a new improved version of the brushes, same style externally, same brush I believe but the internal seems more powerful thank you

I love my toothbrush, but I’m a little concerned about micro plastics with it. I’ve been using this product for six years. I’m on my second toothbrush, and I have the subscription to get new toothbrush heads every three months. My teeth are in great shape, and my dentist is impressed with the toothbrush.

Usually works well but my brush did not fit properly this time/package. Extremely loose and keeps coming off everytime I brush my teeth.