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.Customs & duties included in the price

Help Track order

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A$40

Duties & taxes included

In stock

Sold byAmazon AustraliaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔧 Keep your pump flawless, because every drop counts!

SAFE SOUND - Crafted from BPA and DEHP-free silicone for worry-free pumping.
TRUSTED BY THOUSANDS - Highly rated with 4.7 stars from over 1,600 happy parents who swear by its quality.
COST EFFECTIVE SOLUTION - Save money and avoid buying a new pump by simply replacing worn parts.
ECO FRIENDLY DURABILITY - Silicone construction ensures long-lasting, reliable use without compromising safety.
COMPLETE REPLACEMENT KIT - Includes 4 O-rings and 2 membranes to restore your Medela Harmony pump’s peak performance.

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 O-rings and 2 membranes to ensure a secure, hygienic, and efficient pumping experience. Lightweight and durable, this kit extends the life of your pump while maintaining safety and performance, making it a must-have for proactive parents.

Specifications

ASIN	B016Y51X5U
Additional Features	Bpa Free
Best Sellers Rank	#11,671 in Baby Products ( See Top 100 in Baby Products ) #63 in Breast Pump Parts
Brand	Maymom
Brand Name	Maymom
Color	White
Customer Reviews	4.7 out of 5 stars 1,660 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

A**A

Great pump pieces

Very happy with these pieces. Needed an o ring for Medela hand pump and it works perfect

27.08.2026

M**Y

Adecuados

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

2.01.2024

S**A

Works perfectly

Great for the purpose. The first o-ring aka original got lost, but this o-ring has worked for a couple of months now without any complaints.

16.07.2026

D**L

Great fix

These made my hand pump work like new again! Worth every penny to have to seal and suction working fully again. Easy to replace, and e good enough price to keep them replaced and things running at top notch

10.09.2026

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Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Yusuf A.

Fantastic experience overall. Will recommend to friends and family.

1 month ago

Meera L.

Smooth transaction and product arrived in perfect condition.

3 weeks ago

View all Trustpilot reviews

A$40

Duties & taxes included

In stock

Sold byAmazon AustraliaDelivered 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 Australia.

Secure transaction

ProDesertcart PRO

Fast, free shipping, member pricing & priority support.

Join PRO →

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago