Repairing a robot's bad motivator can be troublesome, however fitting a new side brush on your Roomba 800 or 900 series Robot is simple. The 800 and 900 Series side brush is easy to remove and install - there's no need for a bad feeling about it; just use a coin or similar household item. Please note: this pack comes with three brushes which are compatible with Roomba 800 and 900 series only.