This feeder is conveniently adaptable so that you can go from serving sunflower seed or blends ranging from mixed seed to nyjer with a simple adjustment to the ports. The Perky-Pet wild bird and finch feeder is able to hold up to 1.8 lb. of seed within its reservoir which can easily be monitored for fullness thanks to the clear design. Additionally this unique feeder is constructed of sturdy plastic to ensure durability. Complete with six adjustable feeding ports the 2 in 1 tube feeder can accommodate multiple birds at once to prevent competition for food. Each port also features a built in perch to allow birds rest while they dine. Your resident birds will be flocking to this feeder in no time.