The new Critter Trail space-saving food dispenser designed to provide your pet hamster, gerbil or mouse with a continuous supply of fresh food. The dispenser mounts to the outside of your pet"s cage to save living space for your pet. Works with both seed and block diets. Comes is assorted colors. Actual size 3-3/4-inch long, 2-3/4-inch wide and 4-inch high