The new CritterTrail space-saving food dispenser is designed to provide your pet hamster, gerbil, or mouse with a continuous supply of fresh food. The dispenser mounts to the outside of your pets cage to save living space for your pet. Actual size 3.75" long, 2.75" wide and 4" high Ships in assorted Colors Universally connectable to most Kaytee CritterTrail modular habitats Safety Guards will keep food in, pets out and prevents chewing Works with seed and most pellet food diets Note: For hamsters, mice, and other small animals