Replacement Parts for Medela Harmony Manual Pump; 4 O-Rings, 2 Membranes by Maymom

Amazon.com Price: $6.99 (as of 09/25/2022 19:59 PST- Details)

Replacement O-ring compatible with Medela Harmony pump plus two membranes
BPA free
4 o-rings and 2 membranes