The best bamboo electric toothbrush heads have medium/soft bristles made from castor bean oil and blended with charcoal. These refill heads fit most Phillips Sonicare electric toothbrush models.
Each package contains four refill heads in kraft paper boxes.
Insert on the bottom is made from cornstarch PLA and is required for the metal to fit and vibrate effectively.
The words "Phillips Sonicare and 9-Series" are to express compatibility, not for trademark. This product is not sold by Philips Sonicare.
