great SIZE: The size of bird cage feeder 14CM10CM7.5CM, Could load 400g seeds. Designed for small and medium birds, Please measure your feeder door to insure that the Tidy Seed Bird Feeder will fit appropriately for the bird cage use. NO MESS BIRD FEEDER: This parakeet feeder does away with scattered seeds and hulls. Some feeders have claimed no scatter - this one actually works. You bird enters and eats, leaving hulls and uneaten seed behind in the trough-like compartment below ELIMINATES COSTLY WASTE: Youll save money on seed that didnt end up soiled on the floor, underneath the grate or outside of the cage.Hooks included, just hand tighten and hang. THE GIFTS FOR SMALL BIRDS: This small crystal-clear PP feeder is expressly designed for birds as small as finches and canaries to green cheek conures, parrotlets, and Lovebirds to cockatiels. FUNCTIONS: 1. The separation of grain or seeds from the husks and bird shit prevent bird eatting shit; 2. Collect the husks at the small box of bottom to make room clean, 3. The feeder could stock seeds for around half a month or one month which depends on different birds.