Don't waste your money
These replacements are not compatible.  I used them on two different toothbrushes and they didn't work.  Within a week I had used all of them.  Because they were so inexpensive I didn't bother returning them but it is very frustrating when your toothbrush fails when you are ready to leave the house.  Just buy a new toothbrush that comes with extra heads.  In the long run it is the wiser choice.
Rating: 1 stars