Compatible with RoboVac 11S RoboVac 30 Robotic vacuums, floor sweeping robots etc. Made of high quality and environmental friendly material, durable for use. Effectively remove floor dust and at the same time can polish floor. Easy to remove and replace for routine maintenance. It is recommended that to change spare parts regularly to keep your vacuum operating at peak performance. Tips: Soak the deformed bushes in warm water for a few minutes, then smooth the brush, and then can use again after drying. Specification: Material: Nylon Size: Approx. 52mm/2.05 inch Package Includes: 2 Pieces Side Brushes(2 Pack) Note: 1. Due to the light and screen difference, the item's color may be slightly different from the pictures. 2. Please allow 1-3mm differences due to manual measurement.