As I said in the title, I'm sorry I didn't pay attention to the bad reviews. The hoods don't fit my Roomba 900 series. I used to be able to start Roomba when I was at work, but with these extractors, Roomba stops every few minutes and asks me to check the garbage extractors. You will then need to take them out and restart Roomba. Only to repeat everything over and over again after 5 minutes. This is very frustrating. Also, the screws for the small yellow rotating brush are too big for the holes. So in order to use this yellow brush I had to keep and use the screw from my old yellow brush. The filter seems to be working fine. Too bad I didn't buy this set and wasted my money. As a result, I had to buy different garbage collectors and spend more money. Buyer warning!