Features: Can help improve the efficiency of cleaning work. Only fit for MI; for roborocksecond generation; for Xiaowa first generation sweeping machine. Made from premium material, anti-rust and available for long service life.Easy to install, perfectly replace the broken one.High quality and 100% brand new. Specification: Condition: 100% Brand new Material: ABS Color: As shows in pictures Size: approx.45*45*50mm / 1.77*1.77*1.97in Package weight: 30g Package List: 1* Sweeper universal wheel Notice: Please allow slight error due to manual measurement and make sure you do not mind before ordering. Please understand that colors may exist chromatic aberration as the different placement of pictures.