Can’t comment on durability since I just got it but I split the silicone on my duckbill while cleaning and was desperate for a new one and ordered this. I also stay losing the little silicone cup things so glad it comes with duckbill and the cups. It fit perfect in my ameda elite hospital grade pump. It was sweet relief from manual pumping while waiting for the product to come in the mail. Luckily it came in 2 days on a Sunday which I am eternally grateful for !
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