High compatibility: Precisely matches mainstream models, replaces the original size, and fits seamlessly during installation. Flexible fit: elastic cushioning structure, automatically adapts to ground unevenness, does not damage the floor. Silent operation: fits snugly without shaking, reducing dragging noise and disturbance. Lightweight: Lightweight structure, does not increase the robot's load, does not affect battery life. Easy to install: Tool-free quick installation, fits with a single click, easy for both the elderly and children to replace.