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 seamless pump fit

⚙️2 durable membranes for peak suction

🛡️BPA & DEHP-free safe silicone

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€ 20.45

Duties & taxes included

In stock

Sold byAmazon CroatiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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

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Description

🔧 Keep your pump flawless, keep your flow unstoppable!

TOP RATED BY PARENTS - Join thousands of satisfied users who trust these parts to keep their pumping routine smooth.
TRUSTED QUALITY FIT - Designed specifically for Medela Harmony, ensuring hassle-free installation and reliable use.
HEALTH FIRST MATERIALS - Crafted from BPA and DEHP-free silicone to keep your baby’s safety front and center.
COMPLETE REPLACEMENT KIT - Includes 4 O-rings and 2 membranes—everything you need to maintain optimal pump function.
PERFECT PUMP PERFORMANCE - Restore your Medela Harmony pump’s efficiency 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. Engineered for a perfect fit and durability, these parts ensure consistent suction and pump performance, trusted by thousands of parents worldwide.

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

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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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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Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

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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

Vikram D.

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

2 weeks ago

Rajesh P.

Customer service was outstanding when I had questions about the product.

2 days ago

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€ 20.45

Duties & taxes included

In stock

Sold byAmazon CroatiaDelivered 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 Croatia.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Imran F.

Very reliable shop with genuine products. Will definitely buy again!

2 weeks ago

Reema J.

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

1 month ago

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Brand	Maymom
Material	Silicone
Material Type Free	BPA Free
Number of items	1
Operation mode	Manual
Special feature	Bpa Free

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

Details

Details

Description

Specifications

Reviews

Common Questions