Our squirrel-proof Advantage is quick to fill and easy to clean. And did we mention it's indestructible? This ultra-clever design is ours alone. The Advantage has a metal Squirrel-Blocker grid on each side that rests above the seed to prevent squirrels from reaching the food. Our EasyClean Advantage provides excellent squirrel protection without batteries, weights or springs. The grids pull right out so you can clean every inch of this feeder in a jiffy. Roof lifts easily for filling then locks tightly to keep squirrels out. Clear plastic view panel lets you monitor the seed level. For best results we recommend black oil sunflower seed or a blend of large seeds. Comes with a hanger or you can post mount. Duncraft's 5-Year Guarantee.