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.

O Ring And Membrane For Medela Harmony

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

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R$232

Duties & taxes included

In stock

Sold byAmazon BrazilDelivered 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 Brazil.

Secure transaction

Description

🔄 Keep your pump performing like day one—because every drop counts!

SAFE SOUND - Crafted from BPA and DEHP-free silicone for worry-free pumping.
PUMP LIKE NEW - Revive your pump’s suction power and efficiency without buying a new unit.
TRUSTED BY THOUSANDS - 4.7-star rating from over 1,600 parents who swear by its reliability.
COMPLETE REPLACEMENT KIT - Includes 4 O-rings and 2 membranes to restore peak pump performance.
EFFORTLESS COMPATIBILITY - Designed specifically for Medela Harmony manual pumps—fit and function guaranteed.

The Maymom O-Ring and Membrane set is a premium replacement kit for Medela Harmony manual breast pumps, featuring 4 silicone O-rings and 2 membranes made from BPA and DEHP-free materials. Engineered to restore optimal suction and durability, this kit ensures safe, hygienic, and efficient pumping, backed by a 4.7-star rating from over 1,600 satisfied users.

Specifications

ASIN	B016Y51X5U
Additional Features	Bpa Free
Best Sellers Rank	#11,575 in Baby Products ( See Top 100 in Baby Products ) #58 in Breast Pump Parts
Brand	Maymom
Brand Name	Maymom
Color	White
Customer Reviews	4.7 out of 5 stars 1,610 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

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

S**H

Quick and perfect

When I use my pump, I realised that I lost o-ring and couldn’t use pump at all. So I wanted to get it ASAP. Then I found this product, made me very happy. Oder immediately. The product came so quick and perfect replacement. I couldn’t find something like this any other place, so very happy!

7.12.2019

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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

Reema J.

Perfect platform for hard-to-find items. Delivery was prompt.

1 month ago

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R$232

Duties & taxes included

In stock

Sold byAmazon BrazilDelivered 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 Brazil.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Vikram D.

The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

Neha S.

Excellent communication throughout the order process. Product is perfect.