---
title: "16mm flange inserts — Niche Verdict: Skip it (43/100) | Amazon United States - Flapen"
canonical_url: "https://flapen.com/amazon/research/us/baby-products/16mm-flange-inserts"
last_updated: "2026-07-14T04:59:06.088Z"
locale: en
meta:
  description: "soft demand (-2.5% this quarter) — 16mm flange inserts doesn't clear our bar today."
  "og:description": "soft demand (-2.5% this quarter) — 16mm flange inserts doesn't clear our bar today."
  "og:title": "16mm flange inserts — Niche Verdict: Skip it (43/100) | Amazon United States - Flapen"
---

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# **16mm flange inserts**

**Skip it**

Soft demand (-2.5% this quarter) — this niche doesn't clear our bar today.

Market size 35Growth 24Conversion 98Competition 33Returns 34Price range 68Avg price 61Brand share 28Review moat 41Quality gap 48

**Conversion**

**Incredible****16.2%**

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

**Price range**

**Good****$6.90–$32.43**

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

**Avg price**

**Good****$13.28**

avg listing price — sweet spot $15–$100

**Quality gap**

**Okay****4.5★**

avg incumbent rating — lower means beatable quality

**Review moat**

**Okay****2,404.33**

avg incumbent reviews — the moat a new listing must climb

**Market size**

**Okay****$171K**

$171K/yr · 80K searches

**Returns**

**Okay****4.9%**

return rate — above 6% kills the launch gate

**Competition**

**Okay****65%**

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

**Brand share**

**Okay****88%**

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

**Growth**

**Bad****-2.5%**

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

## **Competition**

The top 5 products take 65% of clicks — established leaders, but buyers still shop beyond them.

**Brands**

**12 **▲rising

**Sellers**

**15**

**Top-5 brand share**

**88%**

**Open market**

**9%**

- Maymom32% - BDICOVE23% - TOVVILD14% - Momstouch13% - IVARONAL5% - Nuliie3% - Open — no brand owns it (6 brands, 9%)

## **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%5%$9K10%$17K15%$26K20%$34K101001K10K 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![4Pcs Breast Pump Flange Insert 16mm 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/41QS6UhGwiL.jpg)**4Pcs Breast Pump Flange Insert 16mm 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**$7.91**4.5★635 rev](https://www.amazon.com/dp/B0DS6XM24H) [2![Maymom 16mm 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/31tVE9LfPNL.jpg)**Maymom 16mm 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**$19.59**4.6★6,022 rev](https://www.amazon.com/dp/B0BLCWN9BW) [3![TOVVILD 16mm Flange Inserts for 24mm Flange/Shield Compatible with Momcozy/Medela/MOMMED/Spectra Breast Pumps Pump Parts Replace (4PCS 16mm)](https://m.media-amazon.com/images/I/414RpG53VIL.jpg)**TOVVILD 16mm Flange Inserts for 24mm Flange/Shield Compatible with Momcozy/Medela/MOMMED/Spectra Breast Pumps Pump Parts Replace (4PCS 16mm)**TOVVILD**$8.89**4.4★1,539 rev](https://www.amazon.com/dp/B0CSFLKG3L) [4![Maymom 16mm Wide Neck Pump Part for Spectra S1/S2 Pumps; Compatible with Motif Luna Pump; Incl Wide Mouth Flange; Not Original Spectra Flange](https://m.media-amazon.com/images/I/41Y2+fodZrL.jpg)**Maymom 16mm Wide Neck Pump Part for Spectra S1/S2 Pumps; Compatible with Motif Luna Pump; Incl Wide Mouth Flange; Not Original Spectra Flange**Maymom**$17.61**4.7★7,932 rev](https://www.amazon.com/dp/B0BJZPR2Q4) [5![Momstouch 16mm 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/41OUI6m+nzL.jpg)**Momstouch 16mm Flange and Duckbill Valve Compatible with Spectra S1 S2 9 Plus Breastpump Replacement to Spectra Pump Parts Not Original Replace Accessories.**Momstouch**$16.74**4.3★592 rev](https://www.amazon.com/dp/B0CKQDLD4Y)

**~~View all top sellers →~~**

### **Newest**

by launch date

[![Spectra - Wide Breast Shield Set for Breast Milk Pump - XS 16mm](https://m.media-amazon.com/images/I/31RdKnzUZIL.jpg)**Spectra - Wide Breast Shield Set for Breast Milk Pump - XS 16mm**SPECTRA**$29.44**1,312 rev4mo ago](https://www.amazon.com/dp/B0GMNWWXSM) [![Nuliie 5-in-1 Flange Sizing Kit 12/14/16/18/20mm for 24mm Flange/Shield of Most Pumps 10PCS Silicone Flange Inserts to Boost Pumping Efficiency & Comfort BPA-Free Pump Essential for Moms](https://m.media-amazon.com/images/I/51GT53yIMsL.jpg)**Nuliie 5-in-1 Flange Sizing Kit 12/14/16/18/20mm for 24mm Flange/Shield of Most Pumps 10PCS Silicone Flange Inserts to Boost Pumping Efficiency & Comfort BPA-Free Pump Essential for Moms**Nuliie**$9.90**445 rev5mo ago](https://www.amazon.com/dp/B0GJRV3N1Q) [![2PC Flange Insert 16mm Compatible with Momcozy Air 1/W1/M9/M6/M5/V1 Pro/V2 Pro for Spectra/eufy/Medela/Elvie/Lansinoh/Paruu with 24mm Flange/Shield Pump Pumping Essentials Flange Insert Kits](https://m.media-amazon.com/images/I/310OdLDehrL.jpg)**2PC Flange Insert 16mm Compatible with Momcozy Air 1/W1/M9/M6/M5/V1 Pro/V2 Pro for Spectra/eufy/Medela/Elvie/Lansinoh/Paruu with 24mm Flange/Shield Pump Pumping Essentials Flange Insert Kits**Wevedk**$6.90**63 rev8mo ago](https://www.amazon.com/dp/B0G1C19J4K) [![6pcs Updated Silicone Flange Insert 16mm Compatible with Momcozy/Medela/Spectra/Eufy/Lansinoh/TSRETE/Elvie/NCVI/Paruu Breast Pump for 24mm Flange/Shield Breastfeeding Essential Replacement Pump Part](https://m.media-amazon.com/images/I/41vEXgqNdmL.jpg)**6pcs Updated Silicone Flange Insert 16mm Compatible with Momcozy/Medela/Spectra/Eufy/Lansinoh/TSRETE/Elvie/NCVI/Paruu Breast Pump for 24mm Flange/Shield Breastfeeding Essential Replacement Pump Part**BDICOVE**$9.91**169 rev10mo ago](https://www.amazon.com/dp/B0FN3SYBT9) [![MOOMentaneous 16mm Oval Flanges Breast Pump Parts Compatible with Medela Breast Pumps PersonalFit Maxflow Freestyle Flex Swing Maxi Connector](https://m.media-amazon.com/images/I/31JfUeX+FuL.jpg)**MOOMentaneous 16mm Oval Flanges Breast Pump Parts Compatible with Medela Breast Pumps PersonalFit Maxflow Freestyle Flex Swing Maxi Connector**MOOMentaneous**$12.61**207 rev11mo ago](https://www.amazon.com/dp/B0FKTJYCBZ)

**~~View all new products →~~**

### **Trending**

90-day click momentum

[![Nuliie 5-in-1 Flange Sizing Kit 12/14/16/18/20mm for 24mm Flange/Shield of Most Pumps 10PCS Silicone Flange Inserts to Boost Pumping Efficiency & Comfort BPA-Free Pump Essential for Moms](https://m.media-amazon.com/images/I/51GT53yIMsL.jpg)**Nuliie 5-in-1 Flange Sizing Kit 12/14/16/18/20mm for 24mm Flange/Shield of Most Pumps 10PCS Silicone Flange Inserts to Boost Pumping Efficiency & Comfort BPA-Free Pump Essential for Moms**Nuliie**$9.90**4.5★**▲ 251%**](https://www.amazon.com/dp/B0GJRV3N1Q) [![Spectra - Wide Breast Shield Set for Breast Milk Pump - XS 16mm](https://m.media-amazon.com/images/I/31RdKnzUZIL.jpg)**Spectra - Wide Breast Shield Set for Breast Milk Pump - XS 16mm**SPECTRA**$29.44**4.6★**▲ 245%**](https://www.amazon.com/dp/B0GMNWWXSM) [![MOOMentaneous 16mm Oval Flanges Breast Pump Parts Compatible with Medela Breast Pumps PersonalFit Maxflow Freestyle Flex Swing Maxi Connector](https://m.media-amazon.com/images/I/31JfUeX+FuL.jpg)**MOOMentaneous 16mm Oval Flanges Breast Pump Parts Compatible with Medela Breast Pumps PersonalFit Maxflow Freestyle Flex Swing Maxi Connector**MOOMentaneous**$12.61**4.2★**▲ 115%**](https://www.amazon.com/dp/B0FKTJYCBZ) [![16mm Maymom MyFit Shields Pano Series; Compatible with Medela Breast Pump- PersonalFit Freestyle Harmony Maxi Freestyle Flex Connector; Connect to Maymom Widemouth/Narrow Connector 2pcs](https://m.media-amazon.com/images/I/31pR0xgNaCL.jpg)**16mm Maymom MyFit Shields Pano Series; Compatible with Medela Breast Pump- PersonalFit Freestyle Harmony Maxi Freestyle Flex Connector; Connect to Maymom Widemouth/Narrow Connector 2pcs**Maymom**$15.53**4.5★**▲ 83%**](https://www.amazon.com/dp/B0D7VKCX1S) [![2PC Flange Insert 16mm Compatible with Momcozy Air 1/W1/M9/M6/M5/V1 Pro/V2 Pro for Spectra/eufy/Medela/Elvie/Lansinoh/Paruu with 24mm Flange/Shield Pump Pumping Essentials Flange Insert Kits](https://m.media-amazon.com/images/I/310OdLDehrL.jpg)**2PC Flange Insert 16mm Compatible with Momcozy Air 1/W1/M9/M6/M5/V1 Pro/V2 Pro for Spectra/eufy/Medela/Elvie/Lansinoh/Paruu with 24mm Flange/Shield Pump Pumping Essentials Flange Insert Kits**Wevedk**$6.90**4.4★**▲ 69%**](https://www.amazon.com/dp/B0G1C19J4K)

**~~View all trending →~~**

## **Demand & seasonality**

Weekly Amazon search volume, last 103 weeks — -2.5% search growth over the last 90 days.

2K1KSpike '25Spike '26 seasonDecMarJunAugNovMarMay

Peak months: Jun · busiest ÷ quietest = 1.7×

## **Reviews**

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

### **What buyers love **

**Size-Overall**31%

*“fits comfortably for me”*

**Quality-Overall**15%

*“Overall, the parts themselves seem great and the quality feels solid”*

**Value For Money**8%

*“Great price”*

**Advertised Vs Actual Product**8%

*“Exactly What I Needed”*

**Ease Of Cleaning**7%

*“The little cleaning sponge is wonderful”*

**Comfort-Overall**6%

*“are very comfy”*

**Compatibility-Overall**4%

*“Everything fits well with my Spectra pump”*

**Ease Of Use**4%

*“was easy to use”*

**Durability**4%

*“durable”*

**Breastfeeding Friendly**4%

*“Very helpful and useful for breastfeeding”*

### **What buyers complain about **

**Size-Overall**25%

*“These are huge”*

**Durability**12%

*“that broke within a few uses”*

**Quality-Overall**8%

*“Poor quality”*

**Value For Money**6%

*“These were not cheap to buy”*

**Thickness**6%

*“The flange part is a bit thin”*

**Compatibility-Overall**4%

*“These don't work with the Elvie”*

**Functionality-Overall**4%

*“Doesnt work for me”*

**Instructions/User Manual/Troubleshooting**4%

*“fewer manuals would be a less frustrating customer experience”*

**Ease Of Use**3%

*“Semi-useful”*

**Adhesion/Stickiness**3%

*“Too sticky; nipple can move”*

### **Top return reasons **

**Size-Overall**70%

**Advertised Vs Actual Product**5%

**Functionality-Overall**5%

**Defective Material/Parts**3%

**Material Quality**3%

**Width**2%

**Value For Money**2%

**Breastfeeding Friendly**2%

**Compatibility-Overall**1%

**Comfort-Overall**1%