I don't need the membranes (I have 10+ spares), can I just get the o-rings?

sorry. that is the only package we sell.

Where do the o rings go?

They go on to the pump handle diaphragm stem. If you ever lose suction it's most likely because one of these came off. Search for "medela hand pump o ring" images in your web browser to see a visual

What are the dimensions of the O-rings?

I don't know the exact measurements of the O-rings but I do know that if you are trying to replace a part for a Medela manual breast pump if it's perfectly.

Maymom O Ring And Membrane For Medela Harmony

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

88.36 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Tunisia.

Secure transaction

Description

🔄 Keep your pump fresh, efficient, and ready to go—because every drop counts!

SAFE SOUND - Crafted from BPA and DEHP-free silicone for worry-free pumping.
TRUSTED QUALITY - Highly rated by thousands of parents for reliability and durability.
STAY READY ALWAYS - Never miss a pumping session with this essential backup kit in your arsenal.
EFFORTLESS MAINTENANCE - Easy to swap parts that restore pump efficiency and hygiene instantly.
COMPLETE REPLACEMENT KIT - Includes 4 O-rings and 2 membranes to keep your Medela Harmony pump performing like new.

The Maymom O-Ring and Membrane set is a premium replacement kit designed specifically for the Medela Harmony manual breast pump. Made from BPA and DEHP-free silicone, it includes 4 durable O-rings and 2 membranes to ensure optimal pump performance and hygiene. Trusted by thousands of parents, this kit helps maintain suction efficiency and prolongs the life of your pump.

Specifications

ASIN	B016Y51X5U
Additional Features	Bpa Free
Best Sellers Rank	#6,836 in Baby Products ( See Top 100 in Baby Products ) #43 in Breast Pump Parts
Brand	Maymom
Brand Name	Maymom
Color	White
Customer Reviews	4.7 out of 5 stars 1,620 Reviews
Global Trade Identification Number	00760488883082
Is the item dishwasher safe?	No
Item Weight	0.2 Ounces
Manufacturer	Maymom
Manufacturer Part Number	M022-4O2M
Material	Silicone
Material Type	Silicone
Material Type Free	BPA Free
Material type free	BPA Free
Model Name	Maymom O-Ring and Membrane for Medela Harmony
Model Number	M022-4O2M
Number of Items	1
Operation Mode	Manual
Operation mode	Manual
Product Style	SD253
Size	One Size
Special features	Bpa Free
UPC	760488883082
Unit Count	1 Count

Reviews

P**C

Perfectos

Era lo que estaba buscando ya que se me desgasto la goma de mi sacaleches manual (Medela) y ha funcionado perfectamente como si fuera nuevo asi que muy contenta con el resultado. Llego super rapido y en muy buenas condiciones.

5.05.2026

M**Y

Adecuados

Me costó trabajar conseguirlos pero vienen varios por si se pierde el empaque del extractor manual ❤️

2.01.2024

C**R

Wieder wie neu

Super gut. Meine Pumpe funktioniert wieder. Die Saugkraft ließ extrem nach und dank den neuem O-Ring funktioniert alles wieder und ich muss mir keine neue kaufen.

30.04.2025

M**K

Helpful

Helpful.

18.04.2025

S**N

Duur maar nodig

Zonder o-ring trekt de kolf niet vacuüm

15.08.2023

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88.36 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Tunisia.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Sneha T.

Received my product in pristine condition. Great service overall.

1 month ago

Zainab N.

Fantastic and great service. Shipping was faster than expected.