The Woodlink seed tube feeder with cage is a wonderful mixed seed feeder with a 1.5-in. caged grid around the exterior. The grid is powder-coated metal allowing birds to slip through easily and protect them from predators. The feeder can hold 1.25 lbs. of bird seed. The tube itself is made from durable ABS plastic and features 4 different feeding stations. Many of your favorite songbirds can slip in but larger birds like doves, blue jays and grackles will have to find another place to feed.