---
title: "19mm flange inserts — Niche Verdict: Skip it (34/100) | Amazon United States - Flapen"
canonical_url: "https://flapen.com/amazon/research/us/baby-products/19mm-flange-inserts"
last_updated: "2026-07-14T06:00:11.206Z"
locale: en
meta:
  description: "prices mostly outside the sweet spot ($7.90–$14.73) — 19mm flange inserts doesn't clear our bar today."
  "og:description": "prices mostly outside the sweet spot ($7.90–$14.73) — 19mm flange inserts doesn't clear our bar today."
  "og:title": "19mm flange inserts — Niche Verdict: Skip it (34/100) | Amazon United States - Flapen"
---

Back to Flapen home

# **19mm flange inserts**

**Skip it**

Prices mostly outside the sweet spot ($7.90–$14.73) — this niche doesn't clear our bar today.

Market size 28Growth 25Conversion 99Competition 16Returns 36Price range 0Avg price 36Brand share 18Review moat 47Quality gap 45

**Conversion**

**Incredible****17.6%**

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

**Review moat**

**Okay****1,826.9**

avg incumbent reviews — the moat a new listing must climb

**Quality gap**

**Okay****4.5★**

avg incumbent rating — lower means beatable quality

**Returns**

**Okay****4.7%**

return rate — above 6% kills the launch gate

**Avg price**

**Okay****$10.36**

avg listing price — sweet spot $15–$100

**Market size**

**Okay****$120K**

$120K/yr · 66K searches

**Growth**

**Bad****-0.0%**

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

**Brand share**

**Bad****93%**

top-5 brand share — brand-locked demand

**Competition**

**Bad****81%**

top-5 click share — a locked-up shelf

**Price range**

**Bad****$7.90–$14.73**

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

## **Competition**

The top 5 products capture 81% of clicks — a locked-up shelf that new listings rarely crack.

**Brands**

**7 **▼falling

**Sellers**

**10**

**Top-5 brand share**

**93%**

**Open market**

**3%**

- Suniceme48% - BDICOVE13% - Hranio13% - GOCROWEEN11% - Maymom8% - Momcozy4% - Open — no brand owns it (1 brand, 3%)

## **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%15%$18K30%$36K45%$54K60%$72K1001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales

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

All 10 tracked products in this niche — three views at once, no toggling.

### **Top sellers**

by 90-day click share

[1![Flange Inserts 19mm Compatible with Medela/Spectra/TSRETE/Elvie/Momcozy/Bellababy Breast Pump 24mm Shields/Flanges Reduce 24mm Nipple Tunnel Down to 19 mm 4PCS](https://m.media-amazon.com/images/I/317hKaswmrL.jpg)**Flange Inserts 19mm Compatible with Medela/Spectra/TSRETE/Elvie/Momcozy/Bellababy Breast Pump 24mm Shields/Flanges Reduce 24mm Nipple Tunnel Down to 19 mm 4PCS**Suniceme**$8.00**4.5★971 rev](https://www.amazon.com/dp/B0CW1WG42M) [2![Flange Insert 19mm 6pcs Flange Sizing Kit Compatible with Spectra Flange Spectra Pump Parts Momcozy Wearable Breast Pump Manual Breast Pump Spectra Breast Pump Medela Pump Parts and More](https://m.media-amazon.com/images/I/31SAIuaymjL.jpg)**Flange Insert 19mm 6pcs Flange Sizing Kit Compatible with Spectra Flange Spectra Pump Parts Momcozy Wearable Breast Pump Manual Breast Pump Spectra Breast Pump Medela Pump Parts and More**Hranio**$9.90**4.5★371 rev](https://www.amazon.com/dp/B0CNYVSJWL) [3![4Pcs Breast Pump Flange Insert 19mm 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/41NtL85s+QL.jpg)**4Pcs Breast Pump Flange Insert 19mm 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**$7.90**4.5★635 rev](https://www.amazon.com/dp/B0DS6YWTCF) [4![Flange Inserts 19mm 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/31mXsZ+Q6TL.jpg)**Flange Inserts 19mm 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**$7.98**4.6★347 rev](https://www.amazon.com/dp/B0CM5Q7FV6) [5![Flange Inserts 19mm for Medela Spectra 24mm Shields/Flanges Compatible with Momcozy S12 Pro/S9 Pro/S9/S12 Wearable Breast Pump Reduce 24mm Nipple Tunnel Down to 19mm 10PCS](https://m.media-amazon.com/images/I/31Wt6vFpk+L.jpg)**Flange Inserts 19mm for Medela Spectra 24mm Shields/Flanges Compatible with Momcozy S12 Pro/S9 Pro/S9/S12 Wearable Breast Pump Reduce 24mm Nipple Tunnel Down to 19mm 10PCS**GOCROWEEN**$9.94**4.4★2,046 rev](https://www.amazon.com/dp/B0D37SXGKG)

**~~View all top sellers →~~**

### **Newest**

by launch date

[![Momcozy Flange Insert 19mm Compatible with 24mm Flange/Shield of Most Pumps Fit for Momcozy S9Pro/S12Pro/S12Pro-Quick Replacement Accessories 4PCS 19mm](https://m.media-amazon.com/images/I/41m1oOdl0oL.jpg)**Momcozy Flange Insert 19mm Compatible with 24mm Flange/Shield of Most Pumps Fit for Momcozy S9Pro/S12Pro/S12Pro-Quick Replacement Accessories 4PCS 19mm**Momcozy**$12.02**1,166 rev5mo ago](https://www.amazon.com/dp/B0G2WWRBDV) [![6Pcs Breast Pump Flange Insert 19mm 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/31twlrDp+IL.jpg)**6Pcs Breast Pump Flange Insert 19mm 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**$8.78**253 rev1y ago](https://www.amazon.com/dp/B0F1T6Q5P1) [![4Pcs Breast Pump Flange Insert 19mm 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/41NtL85s+QL.jpg)**4Pcs Breast Pump Flange Insert 19mm 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**$7.90**635 rev1y ago](https://www.amazon.com/dp/B0DS6YWTCF) [![Flange Inserts 19mm for Medela Spectra 24mm Shields/Flanges Compatible with Momcozy S12 Pro/S9 Pro/S9/S12 Wearable Breast Pump Reduce 24mm Nipple Tunnel Down to 19mm 10PCS](https://m.media-amazon.com/images/I/31Wt6vFpk+L.jpg)**Flange Inserts 19mm for Medela Spectra 24mm Shields/Flanges Compatible with Momcozy S12 Pro/S9 Pro/S9/S12 Wearable Breast Pump Reduce 24mm Nipple Tunnel Down to 19mm 10PCS**GOCROWEEN**$9.94**2,046 rev2y ago](https://www.amazon.com/dp/B0D37SXGKG) [![Flange Inserts 19mm Compatible with Medela/Spectra/TSRETE/Elvie/Momcozy/Bellababy Breast Pump 24mm Shields/Flanges Reduce 24mm Nipple Tunnel Down to 19 mm 4PCS](https://m.media-amazon.com/images/I/317hKaswmrL.jpg)**Flange Inserts 19mm Compatible with Medela/Spectra/TSRETE/Elvie/Momcozy/Bellababy Breast Pump 24mm Shields/Flanges Reduce 24mm Nipple Tunnel Down to 19 mm 4PCS**Suniceme**$8.00**971 rev2y ago](https://www.amazon.com/dp/B0CW1WG42M)

**~~View all new products →~~**

### **Trending**

90-day click momentum

[![6Pcs Breast Pump Flange Insert 19mm 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/31twlrDp+IL.jpg)**6Pcs Breast Pump Flange Insert 19mm 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**$8.78**4.5★**▲ 216%**](https://www.amazon.com/dp/B0F1T6Q5P1) [![Flange Inserts 19mm for Medela Spectra 24mm Shields/Flanges Compatible with Momcozy S12 Pro/S9 Pro/S9/S12 Wearable Breast Pump Reduce 24mm Nipple Tunnel Down to 19mm 10PCS](https://m.media-amazon.com/images/I/31Wt6vFpk+L.jpg)**Flange Inserts 19mm for Medela Spectra 24mm Shields/Flanges Compatible with Momcozy S12 Pro/S9 Pro/S9/S12 Wearable Breast Pump Reduce 24mm Nipple Tunnel Down to 19mm 10PCS**GOCROWEEN**$9.94**4.4★**▲ 170%**](https://www.amazon.com/dp/B0D37SXGKG) [![Momcozy Flange Insert 19mm Compatible with 24mm Flange/Shield of Most Pumps Fit for Momcozy S9Pro/S12Pro/S12Pro-Quick Replacement Accessories 4PCS 19mm](https://m.media-amazon.com/images/I/41m1oOdl0oL.jpg)**Momcozy Flange Insert 19mm Compatible with 24mm Flange/Shield of Most Pumps Fit for Momcozy S9Pro/S12Pro/S12Pro-Quick Replacement Accessories 4PCS 19mm**Momcozy**$12.02**4.3★**▲ 99%**](https://www.amazon.com/dp/B0G2WWRBDV) [![4Pcs Breast Pump Flange Insert 19mm 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/41NtL85s+QL.jpg)**4Pcs Breast Pump Flange Insert 19mm 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**$7.90**4.5★**▲ 21%**](https://www.amazon.com/dp/B0DS6YWTCF) [![Flange Inserts 19mm 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/31mXsZ+Q6TL.jpg)**Flange Inserts 19mm 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**$7.98**4.6★**▲ 11%**](https://www.amazon.com/dp/B0CM5Q7FV6)

**~~View all trending →~~**

## **Demand & seasonality**

Weekly Amazon search volume, last 104 weeks — -0.0% search growth over the last 90 days.

2K1KSpike '25Prime Day '25Spike '26 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**31%

*“The sizing was accurate”*

**Quality-Overall**18%

*“High quality loved the storage case”*

**Value For Money**8%

*“Great price”*

**Comfort-Overall**8%

*“are very comfy”*

**Ease Of Cleaning**7%

*“The little cleaning sponge is wonderful”*

**Ease Of Use**4%

*“was easy to use”*

**Advertised Vs Actual Product**4%

*“It performs exactly as intended”*

**Breastfeeding Friendly**4%

*“Very helpful and useful for breastfeeding”*

**Durability**3%

*“Very durable”*

**Compatibility-Overall**2%

*“Compatible with spectra pumps”*

### **What buyers complain about **

**Size-Overall**29%

*“These are huge”*

**Quality-Overall**9%

*“Would expect higher quality control from a company who is knowingly serving pregnant and postpartum women”*

**Functionality-Overall**7%

*“Doesnt work for me”*

**Durability**6%

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

**Value For Money**6%

*“Waste of money”*

**Adhesion/Stickiness**4%

*“Too sticky; nipple can move”*

**Ease Of Use**4%

*“Semi-useful”*

**Defective Material/Parts**4%

*“Horrible product, pieces missing, and some pieces broken”*

**Compatibility-Overall**4%

*“Not compatible with Spectra”*

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

*“Instructions were not clear instead they were confusing”*

### **Top return reasons **

**Size-Overall**62%

**Functionality-Overall**7%

**Advertised Vs Actual Product**5%

**Material Quality**5%

**Defective Material/Parts**4%

**Value For Money**2%

**Breastfeeding Friendly**2%

**Width**2%

**Comfort-Overall**2%

**Compatibility-Overall**2%