This feeder may be hung from the included brass rod, or pole mounted using the threaded adapter on the base (pole not included). The nectar recipe is engraved directly onto the feeder cover. The central ant moat can be filled with water to prevent ants from reaching the nectar. The four small perches allow hummingbirds a place to linger and rest, making them easier to observe. Includes a small brush for cleaning. UV-stabilized acrylic construction will last for several seasons. BPA-free and safe for hummingbirds. Nectar guard tips are included to virtually eliminate contamination from bees and flying insects. Dimensions: 9" H x 7" diameter. By Droll Yankees.