I use these filters on my Shark IonFlex DuoClean IF205. While they fit perfectly and at first glance may seem like an exact replacement, especially if you are removing a dirty OEM from your vacuum, they are definitely not of the same quality. The foam roller isn't as dense and the "filter" for the exhaust is just a piece of thin felt. While everything seems to fit perfectly, they are definitely not of the same quality as OEM. You get what you pay for here. Consider investing a few bucks more and getting something better.