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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Maymom O-Ring and Membrane for Medela Harmony

Product ID: 288171874

Details

Brand
Maymom
Material
Silicone
Material type free
BPA Free
Operation mode
Manual
Special features
Bpa Free

💧Durable Silicone Material

🔄4x O-Rings + 2x Membranes

🛡️BPA & DEHP Free Safety

€ 34.33

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Sold byAmazon NetherlandsDelivered 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.
PRECISION FIT - Designed specifically for Medela Harmony to ensure leak-proof, efficient pumping.
TRUSTED QUALITY - Backed by 4.7-star reviews and a top rank in breast pump parts—join thousands of satisfied parents.
LIGHTWEIGHT COMPACT - At just 5.67g and slim dimensions, these parts won’t weigh you down.
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 for the Medela Harmony breast pump, featuring 4 silicone O-rings and 2 membranes made from BPA and DEHP-free materials. Lightweight and precisely engineered, this kit ensures optimal pump performance and hygiene, trusted by thousands of parents with a 4.7-star rating.

Specifications

ASIN	B016Y51X5U
ASIN	B016Y51X5U
Additional Features	Bpa Free
Best Sellers Rank	#2,426 in Baby Products ( See Top 100 in Baby Products ) #9 in Breast Pump Parts
Brand Name	Maymom
Color	White
Customer Reviews	4.7 4.7 out of 5 stars (1,639)
Customer reviews	4.7 4.7 out of 5 stars (1,639)
Global Trade Identification Number	00760488883082
Is Discontinued By Manufacturer	No
Is the item dishwasher safe?	No
Item Weight	0.2 Ounces
Item model number	M022-4O2M
Manufacturer	Maymom
Manufacturer	Maymom
Manufacturer Part Number	M022-4O2M
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
Operation Mode	Manual
Product Dimensions	7.5 x 5 x 0.4 cm; 5.67 g
Product Style	SD253
Size	One Size
UPC	760488883082
Unit Count	1 Count

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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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How is product pricing calculated?+

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.

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TrustScore 4.5 | 7,300+ reviews

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

3 weeks ago

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€ 34.33

Duties & taxes included

In stock

Sold byAmazon NetherlandsDelivered 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 Netherlands.

Secure transaction

ProDesertcart PRO

Fast, free shipping, member pricing & priority support.

Join PRO →

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Rajesh P.

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

2 days ago

Suresh K.

Very impressed with the quality and fast delivery. Will shop here again.

4 days ago

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