Product review (5 stars): Works Beautifully
At first, it puzzled me as the one I was replacing had on one O-ring at the top, while this one had two O-rings at the top. Also, the locking dial was skinnier. I actually went an ask for a return and refund. But after thinking about it for a moment, and comparing the two, I concluded that it ought to fit even with 2 O-rings because the length and shape of the filters were a pretty close to a twin match. So I gave it a try. It slid in easily, and locked down effortlessly, quickly, and securely.  I am impressed and very happy, I quickly canceled the return and refund. And apologize for my earlier misjudgment. It's a great product, and it works beautifully. Thank you.
Starjet