Duncraft's new all-metal Advantage feeder gives you natural squirrel proofing. Our Squirrel-Blocker system has two grids engineered to sit above the access to the seed. The distance and geometry of the two grids prevent a squirrel from getting at the seed -- neither mouth nor paws can reach the food, yet access is easy for your songbirds -- their beaks simply reach in. With this new feeder there are no moving parts to jam or wear. No confusing perch weights or springs to adjust. No batteries to fail or recharge. Its locking roof lifts for convenient filling; stable double-sided perching areas beckon songbirds to feed. The Advantage comes apart quickly for thorough cleaning and goes together again just as easily. Keeping your feeders clean is important for the health of your birds, and it has bever been easier. All metal, weatherproof feeder with clear plastic window for easy seed monitoring. For best results, we recommend using black oil sunflower seed and other mixed grains. Hanger included. Can be post mounted.