I've found that my new Roomba brushes and rollers don't last forever. So I started looking for new ones, I found these replacement parts, the price was good, the reviews were really good, so I took a chance. Brushes and rollers fit like exact replacement parts, Roomba is back in business. The seller also wrote what to do if the rotating brushes are bent, some hot water and whoops they are straight. Using these parts makes replacement parts an easy and inexpensive way to keep my Roomba clean and working. These are great replacement parts instead of expensive OEM ones,