---
title: "17mm flange insert — Niche Verdict: Skip it (39/100) | Amazon United States - Flapen"
canonical_url: "https://flapen.com/amazon/research/us/baby-products/17mm-flange-insert"
last_updated: "2026-07-14T04:58:27.995Z"
locale: en
meta:
  description: "a concentrated shelf (top 5 take 81% of clicks) — 17mm flange insert doesn't clear our bar today."
  "og:description": "a concentrated shelf (top 5 take 81% of clicks) — 17mm flange insert doesn't clear our bar today."
  "og:title": "17mm flange insert — Niche Verdict: Skip it (39/100) | Amazon United States - Flapen"
---

Back to Flapen home

# **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 42Price 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

**Returns**

**Okay****3.9%**

return rate — above 6% kills the launch gate

**Avg price**

**Okay****$10.88**

avg listing price — sweet spot $15–$100

**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

## **Competition**

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%**

**Open market**

**10%**

- Suniceme37% - Hranio30% - Momstouch6% - Maymom6% - Nuliie6% - GOCROWEEN5% - Open — no brand owns it (3 brands, 10%)

## **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%$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](https://m.media-amazon.com/images/I/31Ftp9HOeJL.jpg)**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](https://m.media-amazon.com/images/I/31GSQtvgAnL.jpg)**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](https://m.media-amazon.com/images/I/31D3iJy74TL.jpg)**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](https://m.media-amazon.com/images/I/41ZIqZkpXkL.jpg)**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](https://m.media-amazon.com/images/I/21cnzhcY5DL.jpg)**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.](https://m.media-amazon.com/images/I/413OYHXNwZL.jpg)**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](https://m.media-amazon.com/images/I/41ZIqZkpXkL.jpg)**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](https://m.media-amazon.com/images/I/31Ftp9HOeJL.jpg)**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](https://m.media-amazon.com/images/I/415xYbVux6L.jpg)**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](https://m.media-amazon.com/images/I/41+tUbCDuNL.jpg)**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](https://m.media-amazon.com/images/I/21eMcpDKkwL.jpg)**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](https://m.media-amazon.com/images/I/41ZIqZkpXkL.jpg)**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.](https://m.media-amazon.com/images/I/413OYHXNwZL.jpg)**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](https://m.media-amazon.com/images/I/31D3iJy74TL.jpg)**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](https://m.media-amazon.com/images/I/415xYbVux6L.jpg)**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 →~~**

## **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×

## **Reviews**

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%