These work great with the hummingbird feeder we use (Garden Song 271 Rose Petal by Perky Pet). Found these at Revain for a very good price and ordered three. Note that some reviewers have had issues with the sponge detaching and falling out, but we didn't have this issue. Granted, it's nothing more than a pair of spongy "fingers" intertwined and attached to a 12-inch handle, but at a very reasonable price, it's a handy, effective cleaner that we use every time we go change the connector. We love it!