Corrugated is a favorite material for cats. It combines cat tunnels, cat scratching boards and cat nests to fully meet the needs of cats for fun and rest in all aspects. 1. The curved shape perfectly fits the cat's body that likes to curl up and sleep, so that it can sleep peacefully. 2. Thicken corrugated paper, wear-resistant and scratch-resistant, so that the master can enjoy the fun of grinding claws. 3.18cm diameter cat tunnel, spacious and comfortable, easy to enter and exit. Can save packaging volume, at the same time corrugated loss, replaceable.