Works great! One of the platypus that came with my pump stopped working after the first day. The distance was too big or something to speak of disappointment! Because of this problem with the original duckbills, I was only able to pump one side at a time! I needed a solution FAST! I checked Amed's website to see that it would cost about $12 for just two duck tickets. And I would have to pay more than standard shipping for everything and who knows how long standard shipping would take. So I went to my wonderful friend Revane and found this. They work great! They're a little tighter than the stock duckbills, which isn't a problem, but they're a little harder to remove. One of the other reviews said they took them off with a spoon. I found this a VERY helpful tip. In general, I am happy with the purchase, and now I have backups!
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