Habitrail Twist Hamster Cage, Small Animal Habitat The Habitrail Twist is a complete hamster habitat with a unique oblong cage design The hybrid habitat with a combination of wire framing and clear plastic provides 360-degree air circulation for optimal ventilation Transparent components enable clear view of pet from all angles Compatible with all other Habitrail items 8.5inches length x 20.5 inches width x 10 inches height