---
title: "15mm Flange Insert — $289K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/baby-products/15mm-flange-insert"
last_updated: "2026-08-08T22:38:37.006Z"
locale: en
meta:
description: "Niche score 49/100 · $289K/yr market · 132K searches/yr · $13.00 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 49/100 · $289K/yr market · 132K searches/yr · $13.00 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "15mm Flange Insert — $289K/yr Amazon US Niche (2026) - Flapen"
---
# **15mm flange insert**
**Skip it**
Soft demand (+0.9% this quarter) — this niche doesn't clear our bar today.
Market size 51Growth 26Conversion 98Competition 48Returns 35Price 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
**Review moat**
**Okay****2,601.08**
avg incumbent reviews — the moat a new listing must climb
**Returns**
**Okay****4.2%**
return rate — above 5% kills the launch gate
**Growth**
**Okay****+0.9%**
90-day search growth — must beat 0% to launch
According to Flapen's Amazon United States niche tracking, 15mm flange insert is a $289K/yr Amazon United States market (132K searches/yr). The top 5 brands hold 77% of demand. Verdict: Skip it — 49/100.
Data updated Jul 12, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **15mm flange insert market data**
- **Units sold / yr**
- **20K–25K**
- avg 1,000–1,250/product
- **Revenue / yr**
- **$260K–$325K**
- units × avg price
- **Conversion rate**
- **16.8%**
- **Avg BSR**
- **#48**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **96%**
- **Out of stock**
- **4.9%**
- **Avg brand age**
- **33 months**
- **Avg seller age**
- **172 days**
## **Competition & brand share**
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%**
Top 20: 100%
**Top-5 click share**
**56%**
Top 20: 95%
**Open market**
**16%**
- Maymom28% - Suniceme22% - BDICOVE10% - Momstouch9% - Momcozy8% - IVARONAL7% - Open — no brand owns it (7 brands, 16%)
## **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×
[**Open Trend **](https://flapen.com/research/us/baby-products/15mm-flange-insert/trend)
## **Top 15mm flange insert search terms**
- **15mm flange insert**34K/yr+15.3%14.6% conv. - **15 mm flange insert**26K/yr+1.6%15.2% conv. - **15mm flange spectra**15K/yr-10.4%12.8% conv. - **15 mm flange spectra**10K/yr-5.3%13.9% conv. - **spectra flange 15mm**11K/yr-11.6%16.0% conv. - **15mm flange**7K/yr-2.2%9.8% conv. - **momcozy flange inserts 15mm**6K/yr-7.3%15.6% conv. - **spectra 15mm flange**5K/yr+7.8%17.8% conv. - **spectra 15mm flange set**5K/yr+4.6%16.5% conv. - **15 mm flange**4K/yr-11.9%9.6% conv. [**All search terms **](https://flapen.com/research/us/baby-products/15mm-flange-insert/search-terms)
## **Top 15mm flange insert products on Amazon**
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**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**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.**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)**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**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**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**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**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**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**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**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**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)**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**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**Momcozy**$12.12**4.3★**▲ 70%**](https://www.amazon.com/dp/B0G2WP5TMS)
**~~View all trending →~~**
## **What buyers say about 15mm flange insert**
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%
## **Common questions**
- **Is 15mm flange insert profitable to sell on Amazon United States?**
- The niche generates $289K/yr across 24 tracked products. 2 of 3 products launched in the last 360 days are still selling. 90-day search growth is +0.9%. Flapen's verdict: Skip it (49/100).
- **How competitive is the 15mm flange insert niche?**
- 13 brands and 17 sellers compete. The top 5 products take 56% of clicks and top 5 brands hold 77% of demand.
- **What do buyers complain about in 15mm flange insert?**
- Top complaints mined from reviews: Size-Overall, Functionality-Overall, Quality-Overall. The return rate is 4.2%.
- **When does demand for 15mm flange insert peak?**
- Demand is steady year-round — the busiest month runs 1.6× the quietest.
- **What does it cost to enter the 15mm flange insert niche?**
- Listings span $6.97–$32.48; the average listing price is $13.00 (sweet spot $15–$100). The average incumbent carries 2,601 reviews — the moat a new listing must climb.
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