Feeder holds 4 pounds of seed. Vinyl coated wire and die cast top and bottom offer longer feeder life. Squirrels cannot chew seeds ports because of wire mesh. Hi-impact poly resin tube seed reservoir is surrounded by vinyl coated wire. Discourages squirrels. Birds reach the seed through wire openings and cling to wire guard. Dimensions are 5.66 X 5.753 X 18.733 UPC Code = 095501101059