Aspects' Peanut Silo is a "selective feeder" - only acrobatic birds such as woodpeckers, chickadees, titmice, nuthatches and finches can cling to the perchless stainless steel wire mesh tube. When filled with shelled peanuts, mixed nuts, or sunflower kernels, the silo is irrestable to the most entertaining group of birds that frequent backyards all across the continent. A patented clear polycarbonate color protects tender fingers from any sharp edges on the top of the tube. At the base of the tube is a conical seed diverter that feeds every last seed available to the birds. The Peanut Silos come with a Lifetime Guarantee! Be sure to buy a tube top to protect nuts (ASP281)