PineBush Tube Feeders are manufactured with precision molds for die cast construction. Perches and seed ports are precisely die formed for a consistent fit. Metal seed ports are securely bolted to the seed tube. Poly tubes are formed using a break and shatter resistant material, extending the useful life of the feeder. Poly components contain UV protection for added color stabilization. High quality powder coated finishes. A pull-pin release removable base makes for a quick and easy clean out. Unique perch design discourages other birds and attracts finches only.