Niteangel Multi-Chamber Hamster House Maze - Multi-Room Hideouts & Tunnel Exploring Toys for Hamster Gerbils Mice Lemmings (3-Room Large)3 Chamber Hamster House Large Version developed, especially for Syrian Hamsters. The doors, which around 2. 7 inches (about 6. 85cm) in diameter, it's a mini maze house for hamster 3 Chamber Hamster Maze Comes with 1 entrances and 3 rooms, all rooms and roof platform easy to access like an underground tunnel & maze system by connected opening, highly mimic hamsters wild burrow to stimulate their instinct to hide & explore Multi functional Activity