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.

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Replacement Parts for Medela Harmony Manual Pump; 4 O-Rings and 2 Membranes

Replacement Parts for Medela Harmony Manual Pump; 4 O-Rings and 2 Membranes

Product ID: 48780742

Details

Brand
Maymom
Colour
White
Dishwasher safe?
No
Item weight
0.2 Ounces
Material
Silicone
Material Type Free
BPA Free

🔄4 O-rings for perfect pump seal

⚙️2 durable replacement membranes

🛡️BPA & DEHP free safe silicone

3387 som

Duties & taxes included

In stock

Sold byAmazon KyrgyzstanDelivered 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 Kyrgyzstan.

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Description

🍼 Keep your pump flawless, keep your flow unstoppable!

TRUSTED BY THOUSANDS - Join 1,600+ happy parents who rated this kit 4.7 stars for quality and fit.
HEALTH FIRST MATERIALS - Crafted from BPA and DEHP-free silicone to keep your baby’s safety front and center.
LONG LASTING DURABILITY - Premium silicone parts that outlast originals, saving you time and money.
COMPLETE REPLACEMENT KIT - Includes 4 O-rings and 2 membranes—everything you need to maintain optimal pump function.
SEAMLESS PUMP PERFORMANCE - Restore your Medela Harmony pump’s peak suction with precision-fit O-rings and membranes.

This replacement kit for the Medela Harmony manual breast pump includes 4 silicone O-rings and 2 membranes made from BPA and DEHP-free materials. Designed for a perfect fit and long-lasting durability, it ensures optimal pump performance and safety for your baby. Highly rated by thousands of parents, this kit is an essential accessory to maintain your pump’s efficiency and hygiene.

Specifications

ASIN	B016Y51X5U
Best Sellers Rank	5,086 in Baby Products ( See Top 100 in Baby Products ) 99 in Breast Pumps & Accessories
Brand	Maymom
Brand Name	Maymom
Colour	White
Country Of Origin	Taiwan
Customer Reviews	4.7 out of 5 stars 1,622 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
Model Name	Maymom O-Ring and Membrane for Medela Harmony
Model Number	M022-4O2M
Number of Items	1
Number of items	1
Operation Mode	Manual
Operation mode	Manual
Size	One Size
Special Features	Bpa Free
Special feature	Bpa Free
UPC	760488883082
Unit Count	1 count

Reviews

T**T

Perfect fit

Perfect fit and the seal has lasted longer than the original one so far

15.05.2026

A**R

Great

Great for what I needed it for. Fits perfect in my Medela Harmony pump. Seem like great quality for the price

16.02.2026

C**H

Brilliant

Excellent replacement parts

29.10.2025

B**R

Exactly what we needed

So glad they have this product - it was much needed!! And such good quality

17.11.2024

A**R

Medala spare parts

The o rings fit my medala hand pump after the original broke and it now works again.

9.12.2023

M**A

What was ordered

23.03.2026

A**U

Perfect

Just like the original, same material same build and work perfectly.

19.05.2024

G**A

Good value

I was very happy to find these instead of ordering a whole new bit from Medela, which would have cost me a lot more. They are exactly the same as the branded ones.

17.03.2023

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

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2 months ago

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3387 som

Duties & taxes included

In stock

Sold byAmazon KyrgyzstanDelivered 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 Kyrgyzstan.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Meera L.

Smooth transaction and product arrived in perfect condition.

3 weeks ago

Abdullah B.

Great price for an authentic product. Fast international shipping too!

3 weeks ago

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