Spectate the incredible process of bird nest-making! Key Product Features Refillable container. Synthetic manila rope hanger helps to avoid rot2.62 x 5.75 x 19.5 inches in dimension. Wooden material Provides all-natural nesting material to the birds. Observe birds gathering natural materials and watch them build their nests. Refill bags are available, so that your feathered friends never run out of nest-making materials.