The first and still the best to protect your Hummingbird feeders from ants and other crawling insects. Insert between hanger and feeder and fill with 6 oz. of water, providing a barrier to crawling pests. It is easily mounted with one 5/8” diameter on top, and one 3/8” diameter on bottom (open) hangers, plated for excellent weather protection. The TRAP-IT is molded of one piece weather resistant plastic.