At the risk of sounding like I have some ownership interest, the pic below is what I put in. I also got the extension arm so it comes down above my head rather than hitting me in the chest. It is, without a doubt, the best we have ever used. Putting them in our houses now too. The best part, to me, is that even when you are at a place with lower pressure, this head does not dribble. Its inner workings still give you a decent shower.