Kit of 1 central extraction brush compatible with iRobot i7+ E5 E6. Fully compatible with iRobot i7+ E5 E6 Excellent quality accessories and spare parts, designed to last over time. Easy assembly to enjoy the device in just one minute. The replacement kit compatible with iRobot i7+ E5 E6 is made up of high-quality central extractor rollers and is fully compatible with your robot vacuum cleaner. This is an ideal set to leave your Roomba in full operation for 2 to 4 months. The duration and best way to maintain the spare parts are described below: For maintenance, it is important to keep in mind that they need to be maintained and cleaned periodically. Below we detail the ideal replacement times and their durability: Central extractor brush: it should be cleaned at least every 3 or 4 uses. They last 2 to 4 months depending on use.