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I think what you're looking for are the connectors:
https://www.medelabreastfeedingus.com/products/pump-accessories/195/personalfit-connectors-2pack
Re: Madela pump question
I think what you're looking for are the connectors:
https://www.medelabreastfeedingus.com/products/pump-accessories/195/personalfit-connectors-2pack