This Open Platform feeder uses a grid system above the seed which makes it difficult for squirrels to pick up the seed. Use sunflower seeds for best results. Antique copper finish and metal construction with no moving parts for durability. The pavilon roof will protect the seed and the birds from the weather. Built in rain drainage. Easy seed filling and cleaning. Feeder holds 1 lb. of seed. Measures approximately 11 3/4" x 14 3/4" x 10 1/2".