Habitrail Cristal is a main habitat unit that serves as a safe and secure central living area for hamsters. Habitrail Cristal is completely compatible with all other Habitrail items. The cage is constructed of plastic and wiring for both durability and excellent air circulation. A deep base design with rounded corners makes cleaning easy and minimizes mess. A large plastic door allows easy access to your pet and it has a lock to keep your pet securely inside. Two windows allow you to connect other Habitrail items using our patented Lock Connectors (sold separately). Habitrail Cristal also includes a look out deck with ladder to satisfy your hamster's natural need to explore and hide, a quiet exercise wheel, a chew-proof water bottle and holder with stainless steel tip, a food dish, and a litter guard.