Nectar Guard tips easily slide onto the feeding ports on the underside of the feeder cover
■ The flexible membrane in the center of each tip easily opens.
■ When hummingbirds insert their beaks to feed and close up tight when beaks are removed.
■ The patented Nectar-Guard tips create a barrier flying insects can't penetrate.
■ 12 tips included
■ For use with HummZinger Ultra and Fancy hummingbird feeders.