Nectar Guard tips easily slide onto the feeding ports on the underside of the Aspects feeder cover. The flexible membrane in the center of each tip easily opens when hummingbirds insert their beaks to feed and closes up tight when beaks are removed. Nectar Guard tips create a barrier flying insects can't penetrate. With an ant moat, the A
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Great price for these nectar guard tips. I bought 5 packages so I can replace the tips on my three feeders before storing for winter.