---
title: "spectra flange — Niche Verdict: Skip it (44/100) | Amazon United States - Flapen"
canonical_url: "https://flapen.com/amazon/research/us/baby-products/spectra-flange"
last_updated: "2026-07-14T00:31:36.859Z"
locale: en
meta:
  description: "brand-locked demand (top 5 brands take 94% of clicks) — spectra flange doesn't clear our bar today."
  "og:description": "brand-locked demand (top 5 brands take 94% of clicks) — spectra flange doesn't clear our bar today."
  "og:title": "spectra flange — Niche Verdict: Skip it (44/100) | Amazon United States - Flapen"
---

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# **spectra flange**

**Skip it**

Brand-locked demand (top 5 brands take 94% of clicks) — this niche doesn't clear our bar today.

Market size 61Growth 23Conversion 78Competition 38Returns 39Price range 71Avg price 77Brand share 16Review moat 32Quality gap 32

**Conversion**

**Great****7.9%**

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

**Avg price**

**Great****$15.85**

avg listing price — sweet spot $15–$100

**Price range**

**Good****$8.85–$29.70**

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

**Market size**

**Good****$528K**

$528K/yr · 423K searches

**Returns**

**Okay****4.3%**

return rate — above 6% kills the launch gate

**Competition**

**Okay****62%**

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

**Quality gap**

**Okay****4.6★**

avg incumbent rating — lower means beatable quality

**Review moat**

**Okay****3,251.1**

avg incumbent reviews — the moat a new listing must climb

**Growth**

**Bad****-3.5%**

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

**Brand share**

**Bad****94%**

top-5 brand share — brand-locked demand

## **Competition**

The top 5 products take 62% of clicks — established leaders, but buyers still shop beyond them.

**Brands**

**8 **▲rising

**Sellers**

**21**

**Top-5 brand share**

**94%**

**Open market**

**3%**

- Maymom46% - Nursi Luna18% - SPECTRA13% - Momstouch9% - Nuliie8% - CubCare4% - Open — no brand owns it (2 brands, 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%5%$26K10%$53K15%$79K20%$106K1001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales

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

All 21 tracked products in this niche — three views at once, no toggling.

### **Top sellers**

by 90-day click share

[1![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★2,006 rev](https://www.amazon.com/dp/B0CKZH37FX) [2![Maymom 18mm 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/416VZYzpuxL.jpg)**Maymom 18mm 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**$19.74**4.6★6,022 rev](https://www.amazon.com/dp/B0BLCYPBG7) [3![Spectra Baby USA - Single Breast Flange - Small / 20mm](https://m.media-amazon.com/images/I/31IPU7BRtCL.jpg)**Spectra Baby USA - Single Breast Flange - Small / 20mm**SPECTRA**$14.39**4.8★3,902 rev](https://www.amazon.com/dp/B07CNT9XSP) [4![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) [5![Maymom 21mm Flange and Duckbill Valve Compatible with Spectra S1 S2 9 Plus Replacment Pump Parts Not Original Spectra Flange Duckbill Valve](https://m.media-amazon.com/images/I/41-UdS8uYwL.jpg)**Maymom 21mm Flange and Duckbill Valve Compatible with Spectra S1 S2 9 Plus Replacment Pump Parts Not Original Spectra Flange Duckbill Valve**Maymom**$18.80**4.6★6,022 rev](https://www.amazon.com/dp/B0863NBHRX)

**~~View all top sellers →~~**

### **Newest**

by launch date

[![Momstouch Pump Parts Compatible with Spectra S1/S2/9 Plus Not Original Accessories Full Set Replacements Include 18mm Flanges Duckbill Valves Backflow Protectors Tubings and Bottles](https://m.media-amazon.com/images/I/41ZZV6WG+6L.jpg)**Momstouch Pump Parts Compatible with Spectra S1/S2/9 Plus Not Original Accessories Full Set Replacements Include 18mm Flanges Duckbill Valves Backflow Protectors Tubings and Bottles**Momstouch**$29.70**405 rev10mo ago](https://www.amazon.com/dp/B0FFZZRTZP) [![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) [![Flange Inserts for Spectra Spectra Replacement Pump Parts for S1/S2/9 Plus Not Original Accessories Breast Pump Parts Include 2-Pack 21MM Flanges and 4-Pack Duckbill Valves](https://m.media-amazon.com/images/I/41hA1pmHdFL.jpg)**Flange Inserts for Spectra Spectra Replacement Pump Parts for S1/S2/9 Plus Not Original Accessories Breast Pump Parts Include 2-Pack 21MM Flanges and 4-Pack Duckbill Valves**CubCare**$9.50**119 rev11mo ago](https://www.amazon.com/dp/B0FM8WRP85) [![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) [![MOOMentaneous 18mm Flange and Duckbill Valve Compatible with Spectra S1/S2 and 9 Plus Not Original Spectra Pump Parts Replacement](https://m.media-amazon.com/images/I/41L15XKg8rL.jpg)**MOOMentaneous 18mm Flange and Duckbill Valve Compatible with Spectra S1/S2 and 9 Plus Not Original Spectra Pump Parts Replacement**MOOMentaneous**$12.30**111 rev1y ago](https://www.amazon.com/dp/B0DJ2KF71C)

**~~View all new products →~~**

### **Trending**

90-day click momentum

[![Flange Inserts for Spectra Spectra Replacement Pump Parts for S1/S2/9 Plus Not Original Accessories Breast Pump Parts Include 2-Pack 21MM Flanges and 4-Pack Duckbill Valves](https://m.media-amazon.com/images/I/41hA1pmHdFL.jpg)**Flange Inserts for Spectra Spectra Replacement Pump Parts for S1/S2/9 Plus Not Original Accessories Breast Pump Parts Include 2-Pack 21MM Flanges and 4-Pack Duckbill Valves**CubCare**$9.50**4.4★**▲ 196%**](https://www.amazon.com/dp/B0FM8WRP85) [![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★**▲ 151%**](https://www.amazon.com/dp/B0CKZH37FX) [![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★**▲ 139%**](https://www.amazon.com/dp/B0FC2BKZBW) [![Momstouch Pump Parts Compatible with Spectra S1/S2/9 Plus Not Original Accessories Full Set Replacements Include 18mm Flanges Duckbill Valves Backflow Protectors Tubings and Bottles](https://m.media-amazon.com/images/I/41ZZV6WG+6L.jpg)**Momstouch Pump Parts Compatible with Spectra S1/S2/9 Plus Not Original Accessories Full Set Replacements Include 18mm Flanges Duckbill Valves Backflow Protectors Tubings and Bottles**Momstouch**$29.70**4.6★**▲ 98%**](https://www.amazon.com/dp/B0FFZZRTZP) [![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★**▲ 87%**](https://www.amazon.com/dp/B0D1P24F3X)

**~~View all trending →~~**

## **Demand & seasonality**

Weekly Amazon search volume, last 104 weeks — -3.5% search growth over the last 90 days.

9K7KSpike '25Spike '26 seasonSepDecMarJunAugNovMarMay

No pronounced peak months · busiest ÷ quietest = 1.3×

## **Reviews**

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

### **What buyers love **

**Size-Overall**36%

*“Good variety of sizes”*

**Quality-Overall**13%

*“Amazing quality flanges”*

**Comfort-Overall**9%

*“So comfortable”*

**Ease Of Use**6%

*“Easy to use”*

**Breastfeeding Friendly**6%

*“Very helpful and useful for breastfeeding”*

**Value For Money**6%

*“Great price”*

**Advertised Vs Actual Product**6%

*“It performs exactly as intended”*

**Ease Of Cleaning**6%

*“The little cleaning sponge is wonderful”*

**Compatibility-Overall**3%

*“Compatible with Frida Mom manual pump”*

**Durability**3%

*“durable”*

### **What buyers complain about **

**Size-Overall**32%

*“Need more sizes”*

**Quality-Overall**11%

*“Quality is a little cheaper then I was hoping for”*

**Comfort-Overall**6%

*“Very uncomfortable”*

**Durability**6%

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

**Value For Money**5%

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

**Functionality-Overall**4%

*“Doesnt work”*

**Defective Material/Parts**4%

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

**Compatibility-Overall**4%

*“Incompatible with Elvie Stride”*

**Ease Of Use**3%

*“will come off so easily”*

**Ease Of Cleaning**3%

*“Why did these come dirty”*

### **Top return reasons **

**Size-Overall**73%

**Advertised Vs Actual Product**4%

**Functionality-Overall**4%

**Width**4%

**Defective Material/Parts**3%

**Value For Money**2%

**Material Quality**1%

**Breastfeeding Friendly**1%

**Comfort-Overall**1%

**Compatibility-Overall**1%