Exclusive corrugated paper treadmill, available in 4 sizes (diameters 60, 80, 100, 120cm), suitable for use both inside and outside the track. When the inner side wears out, the braking mode is activated and switched to outer side scraping, doubling the service life. Running mode: Dynamic to meet exercise needs. Braking method: Instantly transform into a traditional cat scratch board. It exclusively adopts 3-inch widened silent wheels, reducing rolling resistance by 40%. The design fully utilizes the natural scratching instinct of cats without the need for guidance.