I will be brief and direct. I was about to buy new filters for my Dyson dc41, I found these filters at a great price but they are nowhere near the original OEM filters. They fit perfectly and are the right size, but don't block fine dust like OEM filters. If you use these filters, you will find that fine dust collects in the tank. With the original filters, I never allowed fine dust to stick to the tank or even in the tank, because the OEM filters caught it before it got into the tank. Dyson.*Material is cheap.*They don't filter fine dust.*You get what you pay for