I got this instead of a brush with my Mya Paragon hookah and it is completely useless. The inside of the stem varies between very narrow and very wide, and consists of a very bumpy surface. I got my hookah over a year ago and it looks like hookah-shisha is providing a brush now instead. Even if your stem is smooth and of consistent width inside, your still better off getting a brush!
This product is very cheaply made. Mine broke in multiple places. You can make essentially the same thing with a copper rod that is much sturdier. Don't waste the 5 bucks.