Habitrail Ovo Tube Cube is an ideal way to allow your hamster to burrow through different routes. By attaching the Habitrail Ovo Tube Cube to an existing Habitrail Ovo system you can create a super fun play area for your hamster as points of connection are on all sides. The Habitrail Ovo Tube Cube has all round perforations to improve the flow of air and ventilation for your hamster to ensure your hamsters home is fresh. Fully combinable with all Habitrail Ovo pieces to create a play and living area as big as your imagination for your hamster.