---
title: "19mm flange — Niche Verdict: Skip it (42/100) | Amazon United States - Flapen"
canonical_url: "https://flapen.com/amazon/research/us/baby-products/19mm-flange"
last_updated: "2026-07-14T01:53:52.672Z"
locale: en
meta:
  description: "brand-locked demand (top 5 brands take 97% of clicks) — 19mm flange doesn't clear our bar today."
  "og:description": "brand-locked demand (top 5 brands take 97% of clicks) — 19mm flange doesn't clear our bar today."
  "og:title": "19mm flange — Niche Verdict: Skip it (42/100) | Amazon United States - Flapen"
---

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# **19mm flange**

**Skip it**

Brand-locked demand (top 5 brands take 97% of clicks) — this niche doesn't clear our bar today.

Market size 60Growth 17Conversion 87Competition 35Returns 35Price range 71Avg price 80Brand share 8Review moat 25Quality gap 37

**Conversion**

**Great****10.1%**

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

**Avg price**

**Great****$17.16**

avg listing price — sweet spot $15–$100

**Price range**

**Good****$8.00–$32.53**

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

**Market size**

**Good****$513K**

$513K/yr · 298K searches

**Quality gap**

**Okay****4.5★**

avg incumbent rating — lower means beatable quality

**Competition**

**Okay****64%**

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

**Returns**

**Okay****4.8%**

return rate — above 6% kills the launch gate

**Review moat**

**Okay****3,967.11**

avg incumbent reviews — the moat a new listing must climb

**Growth**

**Bad****-16.8%**

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

**Brand share**

**Bad****97%**

top-5 brand share — brand-locked demand

## **Competition**

The top 5 products take 64% of clicks — established leaders, but buyers still shop beyond them.

**Brands**

**7 **▲rising

**Sellers**

**9**

**Top-5 brand share**

**97%**

**Open market**

**2%**

- Maymom77% - Hranio8% - Momstouch6% - CubCare3% - PUMPMOM-US2% - BALIME2% - Open — no brand owns it (1 brand, 2%)

## **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%$51K20%$103K30%$154K40%$205K1001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales

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

All 19 tracked products in this niche — three views at once, no toggling.

### **Top sellers**

by 90-day click share

[1![Maymom 19mm Flange and Duckbill Valve Compatible with Spectra S1 S2 Breastpump Not Original S2 Accessories Not Original Spectra Replacement Duckbill Valve and Flange](https://m.media-amazon.com/images/I/41Xw9aS94DL.jpg)**Maymom 19mm Flange and Duckbill Valve Compatible with Spectra S1 S2 Breastpump Not Original S2 Accessories Not Original Spectra Replacement Duckbill Valve and Flange**Maymom**$18.75**4.6★6,022 rev](https://www.amazon.com/dp/B0863MVC1T) [2![Maymom Pump Parts Compatible with Spectra S2 S1 Replacement Kit for Spectra Pump Parts 24 mm Flange Duckbill Valve Tube Bottle Backflow Protector Not Original S2 S1 Accessories](https://m.media-amazon.com/images/I/41Nfo-bQwSL.jpg)**Maymom Pump Parts Compatible with Spectra S2 S1 Replacement Kit for Spectra Pump Parts 24 mm Flange Duckbill Valve Tube Bottle Backflow Protector Not Original S2 S1 Accessories**Maymom**$32.53**4.6★9,124 rev](https://www.amazon.com/dp/B07LBD522D) [3![Maymom Wide Neck Pump Part Compatible with Spectra S1/S2 Pumps; Incl Wide Mouth Flange; Not Original Spectra Flange; Replaces Shield (19 mm Two Flanges)](https://m.media-amazon.com/images/I/41oy0mq1PDL.jpg)**Maymom Wide Neck Pump Part Compatible with Spectra S1/S2 Pumps; Incl Wide Mouth Flange; Not Original Spectra Flange; Replaces Shield (19 mm Two Flanges)**Maymom**$16.63**4.7★7,932 rev](https://www.amazon.com/dp/B078PL563L) [4![17mm 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/31EPq0K1+UL.jpg)**17mm 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★8,889 rev](https://www.amazon.com/dp/B0CCHW6VH4) [5![Hranio Breast Pump Parts Compatible with 19mm Spectra Flange 19mm Spectra Replacement Pump Parts s1 s2 (Flange 19mm 2 Pcs)](https://m.media-amazon.com/images/I/41n6bMJqBWL.jpg)**Hranio Breast Pump Parts Compatible with 19mm Spectra Flange 19mm Spectra Replacement Pump Parts s1 s2 (Flange 19mm 2 Pcs)**Hranio**$9.83**4.5★217 rev](https://www.amazon.com/dp/B0D93KPVVV)

**~~View all top sellers →~~**

### **Newest**

by launch date

[![BALIME 19MM Wide-Mouth Flange Spectra Replacement Pump Parts for S1 S2 - BPA Free Spectra Replacement Pump Parts - Perfect for Travel & Working Moms (2-Pack)](https://m.media-amazon.com/images/I/31J6wDpTuzL.jpg)**BALIME 19MM Wide-Mouth Flange Spectra Replacement Pump Parts for S1 S2 - BPA Free Spectra Replacement Pump Parts - Perfect for Travel & Working Moms (2-Pack)**BALIME**$8.25**129 rev11mo ago](https://www.amazon.com/dp/B0DXTSWZKM) [![Flange Inserts for Spectra Spectra Replacement Pump Parts for S1/S2/9 Plus Not Original Accessories Breast Pump Parts Include 2-Pack 19MM Flanges and 4-Pack Duckbill Valves](https://m.media-amazon.com/images/I/41e2UNinX7L.jpg)**Flange Inserts for Spectra Spectra Replacement Pump Parts for S1/S2/9 Plus Not Original Accessories Breast Pump Parts Include 2-Pack 19MM Flanges and 4-Pack Duckbill Valves**CubCare**$9.74**119 rev11mo ago](https://www.amazon.com/dp/B0FM9CCTY9) [![Hranio Breast Pump Parts Compatible with 19mm Spectra Flange 19mm Spectra Replacement Pump Parts s1 s2 (Flange 19mm 2 Pcs)](https://m.media-amazon.com/images/I/41n6bMJqBWL.jpg)**Hranio Breast Pump Parts Compatible with 19mm Spectra Flange 19mm Spectra Replacement Pump Parts s1 s2 (Flange 19mm 2 Pcs)**Hranio**$9.83**217 rev2y ago](https://www.amazon.com/dp/B0D93KPVVV) [![PumpMom-us 19mm Soft Rim Flanges Compatible with Spectra S2 S1 9 Plus Breastpumps Accessories Replacement Breast Shield and Duckbill Valves for Spectra Pump Parts and 19 Flange](https://m.media-amazon.com/images/I/41ASpRkOvvL.jpg)**PumpMom-us 19mm Soft Rim Flanges Compatible with Spectra S2 S1 9 Plus Breastpumps Accessories Replacement Breast Shield and Duckbill Valves for Spectra Pump Parts and 19 Flange**PUMPMOM-US**$16.80**915 rev2y ago](https://www.amazon.com/dp/B0D1P24F3X) [![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

[![Momstouch 19mm Flange Compatible with Spectra S1 S2 9 Plus Synergy Gold Breastpump Replacement to Spectra Pump Parts and Flange; Not Original; Replaces Shield](https://m.media-amazon.com/images/I/41st3-o8KQL.jpg)**Momstouch 19mm Flange Compatible with Spectra S1 S2 9 Plus Synergy Gold Breastpump Replacement to Spectra Pump Parts and Flange; Not Original; Replaces Shield**Momstouch**$15.67**4.6★**▲ 152%**](https://www.amazon.com/dp/B0CM62ZFX3) [![BALIME 19MM Wide-Mouth Flange Spectra Replacement Pump Parts for S1 S2 - BPA Free Spectra Replacement Pump Parts - Perfect for Travel & Working Moms (2-Pack)](https://m.media-amazon.com/images/I/31J6wDpTuzL.jpg)**BALIME 19MM Wide-Mouth Flange Spectra Replacement Pump Parts for S1 S2 - BPA Free Spectra Replacement Pump Parts - Perfect for Travel & Working Moms (2-Pack)**BALIME**$8.25**4.4★**▲ 91%**](https://www.amazon.com/dp/B0DXTSWZKM) [![Momstouch 19mm 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/41LK412r0gL.jpg)**Momstouch 19mm 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★**▲ 64%**](https://www.amazon.com/dp/B0CKQKCDMY) [![PumpMom-us 19mm Soft Rim Flanges Compatible with Spectra S2 S1 9 Plus Breastpumps Accessories Replacement Breast Shield and Duckbill Valves for Spectra Pump Parts and 19 Flange](https://m.media-amazon.com/images/I/41ASpRkOvvL.jpg)**PumpMom-us 19mm Soft Rim Flanges Compatible with Spectra S2 S1 9 Plus Breastpumps Accessories Replacement Breast Shield and Duckbill Valves for Spectra Pump Parts and 19 Flange**PUMPMOM-US**$16.80**4.4★**▲ 61%**](https://www.amazon.com/dp/B0D1P24F3X) [![Maymom 19mm 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/316VxPrpR5L.jpg)**Maymom 19mm MyFit Shields Pano Series; Compatible with Medela Breast Pump- PersonalFit Freestyle Harmony Maxi Freestyle Flex Connector; Connect to Maymom Widemouth/Narrow Connector 2pcs**Maymom**$15.49**4.5★**▲ 46%**](https://www.amazon.com/dp/B0C2BRW4N4)

**~~View all trending →~~**

## **Demand & seasonality**

Weekly Amazon search volume, last 103 weeks — -16.8% search growth over the last 90 days.

10K6KPrime Day '25Spike '25Spike '26 seasonSepDecMarJunAugNovMarMay

Peak months: Jan · busiest ÷ quietest = 1.9×

## **Reviews**

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

### **What buyers love **

**Size-Overall**30%

*“Fit me and the pump”*

**Value For Money**11%

*“Worth it”*

**Quality-Overall**10%

*“High quality loved the storage case”*

**Compatibility-Overall**9%

*“they work great with mine”*

**Advertised Vs Actual Product**6%

*“does what it is intended to do”*

**Comfort-Overall**6%

*“So comfortable”*

**Ease Of Cleaning**3%

*“Easy to clean”*

**Washability**3%

*“the parts are easy to wash”*

**Breastfeeding Friendly**3%

*“I used them throughout my pumping, and they worked great, no issues, and came clean easily with Dawn soap, even when there was coconut oil or nipple cream on the flanges”*

**Ease Of Use**2%

*“Easy to use, easy to clean in electric sterile and dryer”*

### **What buyers complain about **

**Size-Overall**32%

*“Way too big”*

**Quality-Overall**10%

*“the flanges did not seem like they should have made it past quality control”*

**Connectivity-Overall**9%

*“pretty useless when the bottles dont really connect”*

**Durability**8%

*“Breaks easily”*

**Functionality-Overall**8%

*“Did not work”*

**Defective Material/Parts**5%

*“Seems to be this flange is defective”*

**Value For Money**3%

*“imo these are basically $20 trash not $40 worth of savings. actual spectra parts I think are like $60”*

**Strength**3%

*“are flimsy and will not work”*

**Product Condition**2%

*“Arrived used”*

**Ease Of Use**2%

*“When you first start using the adaptors this will feel impossible”*

### **Top return reasons **

**Size-Overall**75%

**Width**4%

**Advertised Vs Actual Product**4%

**Functionality-Overall**4%

**Defective Material/Parts**3%

**Compatibility-Overall**2%

**Value For Money**1%

**Connectivity-Overall**1%

**Product Condition**1%

**Material Quality**1%