---
title: "17mm Flange Insert — $150K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/baby-products/17mm-flange-insert"
last_updated: "2026-08-08T02:25:16.746Z"
locale: en
meta:
description: "Niche score 38/100 · $150K/yr market · 89K searches/yr · $10.88 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 38/100 · $150K/yr market · 89K searches/yr · $10.88 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "17mm Flange Insert — $150K/yr Amazon US Niche (2026) - Flapen"
---
# **17mm flange insert**
**Skip it**
A concentrated shelf (top 5 take 81% of clicks) — this niche doesn't clear our bar today.
Market size 32Growth 34Conversion 97Competition 16Returns 39Price range 17Avg price 41Brand share 34Review moat 47Quality gap 37
**Conversion**
**Incredible****15.5%**
search→purchase rate — share of searches ending in a sale
**Review moat**
**Okay****1,818.75**
avg incumbent reviews — the moat a new listing must climb
**Avg price**
**Okay****$10.88**
avg listing price — sweet spot $15–$100
**Returns**
**Okay****3.9%**
return rate — above 5% kills the launch gate
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Growth**
**Okay****+7.3%**
90-day search growth — must beat 0% to launch
**Brand share**
**Okay****84%**
top-5 brand share — brands hold most of the demand
**Market size**
**Okay****$150K**
$150K/yr · 89K searches
**Price range**
**Bad****$6.58–$16.78**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Competition**
**Bad****81%**
top-5 click share — a locked-up shelf
According to Flapen's Amazon United States niche tracking, 17mm flange insert is a $150K/yr Amazon United States market (89K searches/yr). The top 5 brands hold 84% of demand. Verdict: Skip it — 38/100.
Data updated Jul 12, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **17mm flange insert market data**
- **Units sold / yr**
- **13K–15K**
- avg 1,250–1,500/product
- **Revenue / yr**
- **$136K–$163K**
- units × avg price
- **Conversion rate**
- **15.5%**
- **Avg BSR**
- **#47**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **92%**
- **Out of stock**
- **9.1%**
- **Avg brand age**
- **32 months**
- **Avg seller age**
- **273 days**
## **Competition & brand share**
The top 5 products capture 81% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**9 **▼falling
**Sellers**
**11**
**Top-5 brand share**
**84%**
Top 20: 100%
**Top-5 click share**
**81%**
Top 20: 100%
**Open market**
**10%**
- Suniceme37% - Hranio30% - Momstouch6% - Maymom6% - Nuliie6% - GOCROWEEN5% - Open — no brand owns it (3 brands, 10%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +7.3% search growth over the last 90 days.
2K2KSpike '25 seasonSepDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.5×
[**Open Trend **](https://flapen.com/research/us/baby-products/17mm-flange-insert/trend)
## **Top 17mm flange insert search terms**
- **17mm flange insert**49K/yr+1.8%14.1% conv. - **17 mm flange inserts**28K/yr+14.1%14.8% conv. - **size 17 flange inserts**5K/yr-1.5%16.9% conv. - **flange inserts 17mm**3K/yr+59.8%9.9% conv. - **17 flange inserts**2K/yr+1.6%17.1% conv. - **17mm flange insert spectra**2K/yr+1.4%13.4% conv. [**All search terms **](https://flapen.com/research/us/baby-products/17mm-flange-insert/search-terms)
## **Top 17mm 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%$15K20%$30K30%$45K40%$60K1001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 12 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Suniceme Flange Inserts 17mm Compatible with Medela/Spectra/TSRETE/Elvie/Momcozy/Bellababy Breast Pump 24mm Shields/Flanges Reduce 24mm Nipple Tunnel Down to 17 mm 4PCS**Suniceme**$8.02**4.5★971 rev](https://www.amazon.com/dp/B0D53K5MS2) [2**17mm Flange Insert 6PC Compatible with 17mm Flange Spectra/Flange Inserts for Spectra/Momcozy Flange Inserts/Momcozy Wearable Breast Pump Flange Insert/Flange Inserts for Medela Pump/Willow/TSRETE**Hranio**$9.99**4.5★562 rev](https://www.amazon.com/dp/B0CL5P9MKX) [3**Flange Inserts 17mm 8PC Compatible with Momcozy S12 pro/S9 pro/S9/S10/S12/Medela/TSRETE/Spectra/Bellababy etc 24mm Wearable Breast Pump Reduce 24mm Tunnel Down to Correct Size**GOCROWEEN**$8.00**4.6★347 rev](https://www.amazon.com/dp/B0CM5QX328) [4**4Pcs Breast Pump Flange Insert 17mm 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**$7.87**4.5★635 rev](https://www.amazon.com/dp/B0DS6ZY87Z) [5**Maymom Flange 17mm Insert Compatible with Medela/Spectra/Elvie/momcozy/tsrete/Willow/Motif Luna/Ameda MYA Breastpump 24mm Breast Shields. Reduce 24mm Niple Tunnel Down to 17mm**Maymom**$14.70**4.5★3,517 rev](https://www.amazon.com/dp/B0BGX4YQ1H)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Momstouch 17mm Flange and Duckbill Valve Compatible with Spectra S1 S2 9 Plus Breastpump Replacement to Pump Parts Not Original Replace Accessories.**Momstouch**$16.78**592 rev11mo ago](https://www.amazon.com/dp/B0FC2BKZBW) [**4Pcs Breast Pump Flange Insert 17mm 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**$7.87**635 rev1y ago](https://www.amazon.com/dp/B0DS6ZY87Z) [**Suniceme Flange Inserts 17mm Compatible with Medela/Spectra/TSRETE/Elvie/Momcozy/Bellababy Breast Pump 24mm Shields/Flanges Reduce 24mm Nipple Tunnel Down to 17 mm 4PCS**Suniceme**$8.02**971 rev2y ago](https://www.amazon.com/dp/B0D53K5MS2) [**Nursi Luna Flange Inserts 10PCS 13/15/17/19/21mm for 24mm Flanges/Shield of Most Pumps Flange Sizing Kit Silicone Flanges Insert Breastfeeding Essentials Kit for New Moms**Nursi Luna**$10.05**2,006 rev2y ago](https://www.amazon.com/dp/B0CKZH37FX) [**Nuliie 8PCS Silicone Flanges Insert Replacement Kit Flange Sizing Kit 17mm for 24mm Flange/Shield Breast Pumps Pumping Essential Kit for Moms**Nuliie**$8.46**4,179 rev2y ago](https://www.amazon.com/dp/B0CMPC5D2Q)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**2PCS Flange Insert 17mm Compatible with Medela/Spectra/Willow/TSRETE/Momcozy S9/S12/S9Pro/S12Pro Breastpump 24mm Shields Reduce 24mm Nipple Tunnel Down to Correct Size Pump Parts Replace**Smarbore**$6.58**4.6★**▲ 79%**](https://www.amazon.com/dp/B0B3VSBFPC) [**4Pcs Breast Pump Flange Insert 17mm 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**$7.87**4.5★**▲ 62%**](https://www.amazon.com/dp/B0DS6ZY87Z) [**Momstouch 17mm Flange and Duckbill Valve Compatible with Spectra S1 S2 9 Plus Breastpump Replacement to Pump Parts Not Original Replace Accessories.**Momstouch**$16.78**4.3★**▲ 43%**](https://www.amazon.com/dp/B0FC2BKZBW) [**Flange Inserts 17mm 8PC Compatible with Momcozy S12 pro/S9 pro/S9/S10/S12/Medela/TSRETE/Spectra/Bellababy etc 24mm Wearable Breast Pump Reduce 24mm Tunnel Down to Correct Size**GOCROWEEN**$8.00**4.6★**▲ 36%**](https://www.amazon.com/dp/B0CM5QX328) [**Nursi Luna Flange Inserts 10PCS 13/15/17/19/21mm for 24mm Flanges/Shield of Most Pumps Flange Sizing Kit Silicone Flanges Insert Breastfeeding Essentials Kit for New Moms**Nursi Luna**$10.05**4.6★**▲ 20%**](https://www.amazon.com/dp/B0CKZH37FX)
**~~View all trending →~~**
## **What buyers say about 17mm flange insert**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Size-Overall**34%
*“Sizing seemed accurate”*
**Quality-Overall**18%
*“One thing that really stood out to me was how well-made”*
**Value For Money**8%
*“Great price”*
**Comfort-Overall**7%
*“They are very comfortable”*
**Ease Of Cleaning**5%
*“The little cleaning sponge is wonderful”*
**Ease Of Use**5%
*“Easy to use”*
**Breastfeeding Friendly**4%
*“Very helpful and useful for breastfeeding”*
**Advertised Vs Actual Product**3%
*“they are exactly as described”*
**Durability**3%
*“durable”*
**Compatibility-Overall**2%
*“Compatible with Frida Mom manual pump”*
### **What buyers complain about **
**Size-Overall**27%
*“Need more sizes”*
**Product Condition**6%
*“Got sent used & dirty flanges”*
**Quality-Overall**6%
*“Would expect higher quality control from a company who is knowingly serving pregnant and postpartum women”*
**Durability**5%
*“one of the flange inserts tore right apart immediately after opening”*
**Compatibility-Overall**5%
*“Incompatible with Elvie Stride”*
**Ease Of Cleaning**5%
*“Why did these come dirty”*
**Comfort-Overall**4%
*“Very uncomfortable”*
**Functionality-Overall**4%
*“did not work for me”*
**Value For Money**4%
*“Waste of money”*
**Adhesion/Stickiness**4%
*“after I try to remove it, it sticks/ pinches and pulls at my boon and nipple”*
### **Top return reasons **
**Size-Overall**62%
**Functionality-Overall**7%
**Advertised Vs Actual Product**5%
**Defective Material/Parts**4%
**Material Quality**3%
**Comfort-Overall**3%
**Breastfeeding Friendly**2%
**Value For Money**2%
**Compatibility-Overall**2%
**Width**2%
## **Common questions**
- **Is 17mm flange insert profitable to sell on Amazon United States?**
- The niche generates $150K/yr across 12 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is +7.3%. Flapen's verdict: Skip it (38/100).
- **How competitive is the 17mm flange insert niche?**
- 9 brands and 11 sellers compete. The top 5 products take 81% of clicks and top 5 brands hold 84% of demand.
- **What do buyers complain about in 17mm flange insert?**
- Top complaints mined from reviews: Size-Overall, Product Condition, Quality-Overall. The return rate is 3.9%.
- **When does demand for 17mm flange insert peak?**
- Demand is steady year-round — the busiest month runs 1.5× the quietest.
- **What does it cost to enter the 17mm flange insert niche?**
- Listings span $6.58–$16.78; the average listing price is $10.88 (sweet spot $15–$100). The average incumbent carries 1,819 reviews — the moat a new listing must climb.
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