Amazon.com : Nurse & Nourish 8 O'Rings & 4 Breast Pumps Membranes for Medela Harmony Manual Breast Pump - Nurse and Nourish Parts for Medela Hand Pump Harmony & for Medela Membrane
Maymom O-Ring and Membrane for Medela Harmony – Ana Wiz
Replacement parts of Medela Medela diaphragm O- ring manual breast pump Harmony Harmony (800.0846) | Wish
Replacement Parts for Medela Harmony Manual Pump; 4 O-rings, 2 Membranes by Maymom : Amazon.in: Baby Products