[Compatible Models] Perfect for X40 / X40 Pro / X40 Ultra/ S30 Pro Ultra robot vacuum cleaners. Made of high-quality materials, environmentally friendly materials, soft and durable to use. [Easy Installation] The side brushes are perfectly matched, and the installation method is the same as the parts, which is easy to install and easy to use. [Excellent Performance] The innovative side brush structure effectively prevents hair and other debris from tangling and improves the garbage collection ability. It can penetrate deep into corners and fit tightly against walls and baseboards to ensure an excellent clean area. [Premium Materials] With excellent workmanship, the side brushes are made of environmentally friendly materials and will not pollute the environment. Our side brushes are made of premium materials, which are more durable and clean better than ordinary brushes. The side brush can reach deep into corners and edges to remove more dirt, dust and debris Compatible Models: For X40