Uv stabilized polycarbonate tube; stainless steel wire; spring clamp; sheltering dome 15 long 8 diameter capacity 1lbsLets song birds in keep pesky squirrels out.Sunflower domed cage feeder.Restricts squirrels and larger birds.Wire bottom prevents debris build-up and there is not a collection area for attracting squirrels.The feeder can be hung or pole mounted on our garden pole (model gp).Dimensions (L x W x H):18.25 x 15.75 x 15.75