The elaborate world of Habitrail OVO consists of a variety main habitats, add-ons, trails, and chewable mazes that are easy to assemble—in as little as 60 seconds in some cases—thanks to our exclusive Lock Connectors, that allow easy, safe and secure connections. This replacement pack contains 3 genuine OVO lock connectors exclusive to Habitrail. Based on extensive behavioral studies, Habitrail OVO housing and accessories are designed to help enhance your pet hamster's quality of life. Completely redesigned, re-tooled and reinvigorated, OVO brings even more interesting and entertaining venues in which hamsters can explore, burrow, snooze, exercise or simply chill out.