---
title: "15mm flange insert — Niche Verdict: Worth a look (50/100) | Amazon United States - Flapen"
canonical_url: "https://flapen.com/amazon/research/us/baby-products/15mm-flange-insert"
last_updated: "2026-07-14T05:05:01.473Z"
locale: en
meta:
  description: "15mm flange insert shows searches that convert (16.8% search→purchase), but soft demand (+0.9% this quarter) keeps it on the watch list."
  "og:description": "15mm flange insert shows searches that convert (16.8% search→purchase), but soft demand (+0.9% this quarter) keeps it on the watch list."
  "og:title": "15mm flange insert — Niche Verdict: Worth a look (50/100) | Amazon United States - Flapen"
---

Back to Flapen home

# **15mm flange insert**

**Worth a look**

Shows searches that convert (16.8% search→purchase), but soft demand (+0.9% this quarter) keeps it on the watch list.

Market size 51Growth 26Conversion 98Competition 48Returns 40Price range 69Avg price 58Brand share 46Review moat 39Quality gap 45

**Conversion**

**Incredible****16.8%**

search→purchase rate — share of searches ending in a sale

**Price range**

**Good****$6.97–$32.48**

cheapest to priciest tracked listing — scored on the share inside $15–$100

**Avg price**

**Good****$13.00**

avg listing price — sweet spot $15–$100

**Market size**

**Good****$289K**

$289K/yr · 132K searches

**Competition**

**Okay****56%**

top-5 click share — leaders hold, buyers still browse

**Brand share**

**Okay****77%**

top-5 brand share — brands hold most of the demand

**Quality gap**

**Okay****4.5★**

avg incumbent rating — lower means beatable quality

**Returns**

**Okay****4.2%**

return rate — above 6% kills the launch gate

**Review moat**

**Okay****2,601.08**

avg incumbent reviews — the moat a new listing must climb

**Growth**

**Okay****+0.9%**

90-day search growth — must beat 0% to launch

## **Competition**

The top 5 products take 56% of clicks — established leaders, but buyers still shop beyond them.

**Brands**

**13 **▲rising

**Sellers**

**17**

**Top-5 brand share**

**77%**

**Open market**

**16%**

- Maymom28% - Suniceme22% - BDICOVE10% - Momstouch9% - Momcozy8% - IVARONAL7% - Open — no brand owns it (7 brands, 16%)

## **Product shelf**

Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.

0%10%$29K20%$58K30%$87K40%$115K1001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 24 tracked products in this niche — three views at once, no toggling.

### **Top sellers**

by 90-day click share

[1![Flange Inserts 15mm Compatible with Medela/Spectra/TSRETE/Elvie/Momcozy/Bellababy Breast Pump 24mm Shields/Flanges Reduce 24mm Nipple Tunnel Down to 15 mm 4PCS](https://m.media-amazon.com/images/I/310eyt8NFjL.jpg)**Flange Inserts 15mm Compatible with Medela/Spectra/TSRETE/Elvie/Momcozy/Bellababy Breast Pump 24mm Shields/Flanges Reduce 24mm Nipple Tunnel Down to 15 mm 4PCS**Suniceme**$8.24**4.5★971 rev](https://www.amazon.com/dp/B0CW1P5GRJ) [2![Maymom 15mm Flange and Duckbill Valve Compatible with Spectra S1 Spectra S2 Spectra 9 Plus Not Original Spectra Pump Parts Replace Spectra S2 Pump Parts Spectra Flange Spectra Duckbill Valve](https://m.media-amazon.com/images/I/31XaxdD-v-L.jpg)**Maymom 15mm Flange and Duckbill Valve Compatible with Spectra S1 Spectra S2 Spectra 9 Plus Not Original Spectra Pump Parts Replace Spectra S2 Pump Parts Spectra Flange Spectra Duckbill Valve**Maymom**$19.68**4.6★6,022 rev](https://www.amazon.com/dp/B0BLCW8SVC) [3![Momstouch 15mm Flange and Duckbill Valve Compatible with Spectra S1 S2 9 Plus Breastpump Replacement to Spectra Pump Parts Not Original Replace Accessories.](https://m.media-amazon.com/images/I/41DLuXLjxCL.jpg)**Momstouch 15mm Flange and Duckbill Valve Compatible with Spectra S1 S2 9 Plus Breastpump Replacement to Spectra Pump Parts Not Original Replace Accessories.**Momstouch**$16.71**4.3★592 rev](https://www.amazon.com/dp/B0CKQ9B289) [4![IVARONAL Flange Insert 2PCS 15mm Compatible with Momcozy M9/M6/M5/S12 Pro/V1 Pro/V2 pro Spectra/Medela/Elvie/NCVI/TSRETE/eufy/Lansinoh/Paruu/MomMed Breast Pump 24mm Shields/Flanges (2pcs-15mm)](https://m.media-amazon.com/images/I/31Y6NVpyQhL.jpg)**IVARONAL Flange Insert 2PCS 15mm Compatible with Momcozy M9/M6/M5/S12 Pro/V1 Pro/V2 pro Spectra/Medela/Elvie/NCVI/TSRETE/eufy/Lansinoh/Paruu/MomMed Breast Pump 24mm Shields/Flanges (2pcs-15mm)**IVARONAL**$6.97**4.5★848 rev](https://www.amazon.com/dp/B0D4DN7W51) [5![6Pcs Breast Pump Flange Insert 15mm Compatible with Momcozy/Spectra/Medela/eufy/Elvie/Lansinoh/Paruu P10 Breast Pump Fit for Momcozy M5/M9/M6/V2 Pro/V2 pro/S12 Pro/eufy E10 S1 S1 Pro 24mm Flange](https://m.media-amazon.com/images/I/31gfp1dVrwL.jpg)**6Pcs Breast Pump Flange Insert 15mm Compatible with Momcozy/Spectra/Medela/eufy/Elvie/Lansinoh/Paruu P10 Breast Pump Fit for Momcozy M5/M9/M6/V2 Pro/V2 pro/S12 Pro/eufy E10 S1 S1 Pro 24mm Flange**BDICOVE**$8.83**4.5★253 rev](https://www.amazon.com/dp/B0F1SRZZV9)

**~~View all top sellers →~~**

### **Newest**

by launch date

[![Flange Inserts for Spectra Spectra Replacement Pump Parts for S1/S2/9 Plus Not Original Accessories Breast Pump Parts Include 2-Pack 15MM Flange and 4-Pack Duckbill Valves](https://m.media-amazon.com/images/I/41ZPAP275BL.jpg)**Flange Inserts for Spectra Spectra Replacement Pump Parts for S1/S2/9 Plus Not Original Accessories Breast Pump Parts Include 2-Pack 15MM Flange and 4-Pack Duckbill Valves**CubCare**$9.74**119 rev2mo ago](https://www.amazon.com/dp/B0GXRRBPMT) [![Momcozy Flange Insert 15mm Compatible with 24mm Flange/Shield of Most Pumps Fit for Momcozy S9Pro/S12Pro/S12Pro-Quick Replacement Accessories 4PCS 15mm](https://m.media-amazon.com/images/I/41HOKKO31fL.jpg)**Momcozy Flange Insert 15mm Compatible with 24mm Flange/Shield of Most Pumps Fit for Momcozy S9Pro/S12Pro/S12Pro-Quick Replacement Accessories 4PCS 15mm**Momcozy**$12.12**1,166 rev5mo ago](https://www.amazon.com/dp/B0G2WP5TMS) [![Momcozy M5| M6| M9 Original Replacement Accessories Food-Grade Silicone & BPA Free Original Breastfeeding Parts Inserts 15mm 4 Pack](https://m.media-amazon.com/images/I/317nSaiSCmL.jpg)**Momcozy M5| M6| M9 Original Replacement Accessories Food-Grade Silicone & BPA Free Original Breastfeeding Parts Inserts 15mm 4 Pack**Momcozy**$14.29**2,611 rev10mo ago](https://www.amazon.com/dp/B0FCXYWSPG) [![6Pcs Breast Pump Flange Insert 15mm Compatible with Momcozy/Spectra/Medela/eufy/Elvie/Lansinoh/Paruu P10 Breast Pump Fit for Momcozy M5/M9/M6/V2 Pro/V2 pro/S12 Pro/eufy E10 S1 S1 Pro 24mm Flange](https://m.media-amazon.com/images/I/31gfp1dVrwL.jpg)**6Pcs Breast Pump Flange Insert 15mm Compatible with Momcozy/Spectra/Medela/eufy/Elvie/Lansinoh/Paruu P10 Breast Pump Fit for Momcozy M5/M9/M6/V2 Pro/V2 pro/S12 Pro/eufy E10 S1 S1 Pro 24mm Flange**BDICOVE**$8.83**253 rev1y ago](https://www.amazon.com/dp/B0F1SRZZV9) [![2 Packs 15mm Flange Set Updated Soft Rim Shield and Wide Mouth Base Connector Pump Parts for Spectra S2 Spectra S1 9 Plus Breastpumps Accessories 106 Degree Wider Opening Angel](https://m.media-amazon.com/images/I/414l6YsplTL.jpg)**2 Packs 15mm Flange Set Updated Soft Rim Shield and Wide Mouth Base Connector Pump Parts for Spectra S2 Spectra S1 9 Plus Breastpumps Accessories 106 Degree Wider Opening Angel**IVARONAL**$15.52**170 rev1y ago](https://www.amazon.com/dp/B0F18KLGDH)

**~~View all new products →~~**

### **Trending**

90-day click momentum

[![Flange Inserts for Spectra Spectra Replacement Pump Parts for S1/S2/9 Plus Not Original Accessories Breast Pump Parts Include 2-Pack 15MM Flange and 4-Pack Duckbill Valves](https://m.media-amazon.com/images/I/41ZPAP275BL.jpg)**Flange Inserts for Spectra Spectra Replacement Pump Parts for S1/S2/9 Plus Not Original Accessories Breast Pump Parts Include 2-Pack 15MM Flange and 4-Pack Duckbill Valves**CubCare**$9.74**4.4★**▲ 226%**](https://www.amazon.com/dp/B0GXRRBPMT) [![Momcozy M5| M6| M9 Original Replacement Accessories Food-Grade Silicone & BPA Free Original Breastfeeding Parts Inserts 15mm 4 Pack](https://m.media-amazon.com/images/I/317nSaiSCmL.jpg)**Momcozy M5| M6| M9 Original Replacement Accessories Food-Grade Silicone & BPA Free Original Breastfeeding Parts Inserts 15mm 4 Pack**Momcozy**$14.29**4.3★**▲ 167%**](https://www.amazon.com/dp/B0FCXYWSPG) [![TOVVILD 15mm Flange Inserts for 24mm Flange/Shield Compatible with Momcozy/MOMMED/Spectra Breast Pumps Pump Parts Replace (4PCS 15mm)](https://m.media-amazon.com/images/I/41Hmojh7MEL.jpg)**TOVVILD 15mm Flange Inserts for 24mm Flange/Shield Compatible with Momcozy/MOMMED/Spectra Breast Pumps Pump Parts Replace (4PCS 15mm)**TOVVILD**$8.78**4.4★**▲ 138%**](https://www.amazon.com/dp/B0DKNTW25S) [![6Pcs Breast Pump Flange Insert 15mm Compatible with Momcozy/Spectra/Medela/eufy/Elvie/Lansinoh/Paruu P10 Breast Pump Fit for Momcozy M5/M9/M6/V2 Pro/V2 pro/S12 Pro/eufy E10 S1 S1 Pro 24mm Flange](https://m.media-amazon.com/images/I/31gfp1dVrwL.jpg)**6Pcs Breast Pump Flange Insert 15mm Compatible with Momcozy/Spectra/Medela/eufy/Elvie/Lansinoh/Paruu P10 Breast Pump Fit for Momcozy M5/M9/M6/V2 Pro/V2 pro/S12 Pro/eufy E10 S1 S1 Pro 24mm Flange**BDICOVE**$8.83**4.5★**▲ 101%**](https://www.amazon.com/dp/B0F1SRZZV9) [![Momcozy Flange Insert 15mm Compatible with 24mm Flange/Shield of Most Pumps Fit for Momcozy S9Pro/S12Pro/S12Pro-Quick Replacement Accessories 4PCS 15mm](https://m.media-amazon.com/images/I/41HOKKO31fL.jpg)**Momcozy Flange Insert 15mm Compatible with 24mm Flange/Shield of Most Pumps Fit for Momcozy S9Pro/S12Pro/S12Pro-Quick Replacement Accessories 4PCS 15mm**Momcozy**$12.12**4.3★**▲ 70%**](https://www.amazon.com/dp/B0G2WP5TMS)

**~~View all trending →~~**

## **Demand & seasonality**

Weekly Amazon search volume, last 104 weeks — +0.9% search growth over the last 90 days.

3K2KSpike '25Prime Day '25 seasonSepDecMarJunAugNovMarMay

No pronounced peak months · busiest ÷ quietest = 1.6×

## **Reviews**

What buyers praise and complain about, mined from review topics.

### **What buyers love **

**Size-Overall**34%

*“The best sizing kit”*

**Quality-Overall**13%

*“Good parts”*

**Comfort-Overall**9%

*“Comfortable”*

**Ease Of Cleaning**7%

*“The little cleaning sponge is wonderful”*

**Value For Money**7%

*“Good for the price”*

**Ease Of Use**6%

*“Easy to use”*

**Breastfeeding Friendly**4%

*“Very helpful and useful for breastfeeding”*

**Advertised Vs Actual Product**4%

*“It performs exactly as intended”*

**Compatibility-Overall**4%

*“it is compatible”*

**Durability**3%

*“These are durable”*

### **What buyers complain about **

**Size-Overall**28%

*“These are huge”*

**Functionality-Overall**8%

*“didn't work for me”*

**Quality-Overall**7%

*“Not well made”*

**Durability**5%

*“one of the flange inserts tore right apart immediately after opening”*

**Compatibility-Overall**4%

*“Incompatible with Elvie Stride”*

**Value For Money**4%

*“It has almost cost me my milk supply”*

**Ease Of Cleaning**3%

*“Why did these come dirty”*

**Comfort-Overall**2%

*“Very uncomfortable”*

**Ease Of Use**2%

*“Semi-useful”*

**Material Quality**2%

*“not the same material”*

### **Top return reasons **

**Size-Overall**68%

**Functionality-Overall**6%

**Advertised Vs Actual Product**5%

**Defective Material/Parts**3%

**Width**2%

**Material Quality**2%

**Comfort-Overall**2%

**Breastfeeding Friendly**2%

**Value For Money**2%

**Compatibility-Overall**2%