They seem very nice for the price
Unfortunately they don't remotely fit my Sonicare toothbrush.  It must not be Series E.  It doesn't say anywhere on my toothbrush what model it is so I took a chance.  I'm sorry that I really can't review them but they look great - just have a very complicated looking connection with a bulbous collar and 2 little "legs" inside it.  My 3 star rating  is just a guess.
Rating: 3 stars