Review on Anewise 4-Pack Washable Pre-Filter Set Compatible with Dyson Vacuum Cleaners DC30, DC31, DC34, DC35, DC44 Digital Slim, DC56 | Replaces Dyson Pre-Filter Part # 917066-02 by Katie Evans

So these don't fit. Basically, you have to put some effort into getting them in place and then you end up losing suction because the gasket isn't seated properly. But yes. They don't fit, especially my DC35, and since most other models use the exact same chassis frames, they probably won't fit either. This loses suction power. A little. Poorly.