Perfect Size: 14cm10cm7.5cm/5.5inch3.9inch2.9inch, Could Put In About 400g Seeds. Designed For Small And Medium Birds,Please Measure Your Feeder Door To Insure That The Seed Bird Feeder Will Fit Appropriately For The Bird Cage Use. Disperse Seeds And Hulls:Feeder Does It Does Away With Scattered Seeds And Hulls. Your Bird Enters And Eats, Leaving Hulls And Uneaten Seed Behind In The Trough Like Compartment Below. Eliminates Costly Waste: You'Ll Save Money On Seed,Because It Will Not Soiled On The Floor, Underneath The Grate Or Outside Of The Cage. Hooks Include, You Just Need Hand Tighten And Hang. The Best Gifts: This small crystal-clear PP feeder is expressly designed for birds as Perfect Used For Parakeet, Cockatiel, Budgerigar, Macaw, Finch, Budgie, Canary, Parrots, And Other Small Or Medium Bird. ENJOYING FOOD: The Parrot Integrated Automatic Bird Feeder can put in what your pet bird would like, such as all kinds of grains, nutriment. But large seeds cant be put on the inside, because it may feed stuck under the box. The feeder could stock seeds about 7-15 days which depends on different birds