Compatible with all Room-ba 500, 600, 700, 800 and 900 series models.High Quality Material: Made of high quality material, it is durable and has great resilience, it has excellent grip on all surfaces such as terrazzo, parquet, floor, smooth and rough floors. Compact serrated tires ensure a smooth ride, prevent the tires from slipping on the ground, and improve cleaning efficiency.Easy to fit: Cut and remove worn rubber tires and install new tires. Front wheels easy to change without tools.ANTI-SLIP: The rim rubber is non-slip and prevents the rim from slipping on the floor of your home. Prevents robot breakdowns, increases cleaning efficiency and increases abrasion resistance.color:BlackMaterial:rubberPackage Contents:1 pair x tire apron1 x casters1 x cleaning brushOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.