The Trixie Natural Living Frida Tunnel System is a high-quality wood tower that provides ample storage space for your mouse, hamster, or other small animal. The system includes a 2-story house with a tunnel, various climbing opportunities, and a target species list that includes mice, hamsters, and gerbils. The house measures 8.66 inches long by 5. 91 inches wide by 18. 5 inches tall and the tunnel is 47 inches long by 22 inches wide. The various climbing opportunities include a spiral staircase, an L-shaped ladder, and a central pillar.