Designed for partial Roomba E I & J Series E5 E6 i7 i7+ i6 i6+ i3 i3+ i4 i4+ i8 i8+ j7 j7+ vacuum cleaner. Please confirm your Roomba model and parts before ordering These roller brushes fit perfectly into your Roomba vacuum cleaner and work just as well as the original brushes Made from environmentally friendly and durable material, delicate and soft, help the vacuum robot to clean the floor effectively In order to maintain the performance of the vacuum cleaner, replace the bristle brush and the beater brush every 6 months. For families with pets the exchange cycle should be shorter 4 pack replacement brushes for partially Roomba E I & J series included. Customer 100% satisfaction is our top priority. Please do not hesitate to contact us if you have any questions or problems, we are always here with you