Round Membrane

Replacement part for THE ONE Double Electric Breast Pump, Express Cups, Express Cups Plus and The INs Wearable Breast Pump.

Materials: Single-piece food-grade silicone construction


Safety: Food safe and free of BPA, PVC, BPS and Phthalates


Purpose: Critical pump part – pump performance will drop if part is worn


Contains: 1 pair included


Lifespan: We recommend replacing this part at the first signs of wear, if damaged or every 2-3 months to maintain the optimal effectiveness of your pump