---
title: "20mm Flange Insert — $125K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/baby-products/20mm-flange-insert"
last_updated: "2026-08-09T03:39:33.599Z"
locale: en
meta:
description: "Niche score 33/100 · $125K/yr market · 51K searches/yr · $17.28 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 33/100 · $125K/yr market · 51K searches/yr · $17.28 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "20mm Flange Insert — $125K/yr Amazon US Niche (2026) - Flapen"
---
# **20mm flange insert**
**Skip it**
Brand-locked demand (top 5 brands take 98% of clicks) — this niche doesn't clear our bar today.
Market size 29Growth 18Conversion 96Competition 9Returns 22Price range 74Avg price 81Brand share 4Review moat 32Quality gap 30
**Conversion**
**Incredible****14.2%**
search→purchase rate — share of searches ending in a sale
**Avg price**
**Great****$17.28**
avg listing price — sweet spot $15–$100
**Price range**
**Good****$8.78–$32.49**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Review moat**
**Okay****3,288.56**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Okay****4.6★**
avg incumbent rating — lower means beatable quality
**Market size**
**Okay****$125K**
$125K/yr · 51K searches
**Returns**
**Bad****5.9%**
return rate — above 5% kills the launch gate
**Growth**
**Bad****-14.7%**
90-day search growth — must beat 0% to launch
**Competition**
**Bad****89%**
top-5 click share — a locked-up shelf
**Brand share**
**Bad****98%**
top-5 brand share — brand-locked demand
**Signals**[** High Returns**](https://flapen.com/research/niches?market=us&signal=high_returns "Return rate > 5%")
According to Flapen's Amazon United States niche tracking, 20mm flange insert is a $125K/yr Amazon United States market (51K searches/yr). The top 5 brands hold 98% of demand. Verdict: Skip it — 33/100.
Data updated Jul 12, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **20mm flange insert market data**
- **Units sold / yr**
- **10K–13K**
- avg 1,250–1,500/product
- **Revenue / yr**
- **$173K–$216K**
- units × avg price
- **Conversion rate**
- **14.2%**
- **Avg BSR**
- **#82**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **89%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **34 months**
- **Avg seller age**
- **160 days**
## **Competition & brand share**
The top 5 products capture 89% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**6 **—flat
**Sellers**
**12**
**Top-5 brand share**
**98%**
Top 20: 100%
**Top-5 click share**
**89%**
Top 20: 100%
**Open market**
**0%**
- Maymom37% - SPECTRA31% - Momstouch24% - MOOMentaneous5% - TOVVILD2% - Gotocut2%
## **Demand & seasonality**
Weekly Amazon search volume, last 102 weeks — -14.7% search growth over the last 90 days.
1K800 seasonDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.2×
[**Open Trend **](https://flapen.com/research/us/baby-products/20mm-flange-insert/trend)
## **Top 20mm flange insert search terms**
- **spectra flange 20mm**14K/yr-9.4%15.6% conv. - **spectra 20mm flange**12K/yr+6.4%15.6% conv. - **20mm flange spectra**10K/yr-35.1%16.6% conv. - **20 mm flange spectra**8K/yr-30.6%16.4% conv. - **spectra 20 mm flange set**6K/yr-4.2%18.4% conv. [**All search terms **](https://flapen.com/research/us/baby-products/20mm-flange-insert/search-terms)
## **Top 20mm flange insert products on Amazon**
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
0%10%$12K20%$25K30%$37K40%$50K101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 9 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Spectra Baby USA - Single Breast Flange - Small / 20mm**SPECTRA**$14.39**4.8★3,902 rev](https://www.amazon.com/dp/B07CNT9XSP) [2**Maymom 20 mm 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**$19.53**4.6★6,022 rev](https://www.amazon.com/dp/B0BL116P5H) [3**Momstouch 20mm Flange and Duckbill Valve Compatible with Spectra S1 S2 9 Plus Breastpump Replacement to Spectra Pump Parts Not Original Replace Accessories.**Momstouch**$16.64**4.3★592 rev](https://www.amazon.com/dp/B0CKQJPVPL) [4**Maymom Wide Neck Pump Part for Spectra S1/S2 Pumps; Incl Wide Mouth Flange; Not Original Spectra Flange; Replaces Spectra Shield (20 mm Two Flanges)**Maymom**$16.72**4.7★7,932 rev](https://www.amazon.com/dp/B0922S3Z6W) [5**MOOMentaneous 20mm Flange and Duckbill Valve Compatible with Spectra S1/S2 and 9 Plus Not Original Spectra Pump Parts Replacement**MOOMentaneous**$12.55**4.6★111 rev](https://www.amazon.com/dp/B0DJ2MZ2CX)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Gotocut 20mm Flange Kit Compatible with Spectra S1/S2/9 Plus/Motif Luna Includes Flange 20mm Bottles Tubing Valves and Backflow Protectors**Gotocut**$18.80**74 rev1y ago](https://www.amazon.com/dp/B0FGXWVND6) [**MOOMentaneous 20mm Flange and Duckbill Valve Compatible with Spectra S1/S2 and 9 Plus Not Original Spectra Pump Parts Replacement**MOOMentaneous**$12.55**111 rev1y ago](https://www.amazon.com/dp/B0DJ2MZ2CX) [**TOVVILD 20mm Flange Inserts for 24mm Flange/Shield Compatible with Momcozy/Medela/MOMMED/Spectra Breast Pumps Pump Parts Replace (4PCS 20mm)**TOVVILD**$8.78**1,539 rev2y ago](https://www.amazon.com/dp/B0CSFKZGTJ) [**Momstouch 20mm Flange Compatible with Spectra S1 S2 9 Plus Synergy Gold Breastpump Replacement to Spectra Pump Parts and Flange; Not Original; Replaces Shield**Momstouch**$15.60**301 rev2y ago](https://www.amazon.com/dp/B0CM61RWS1) [**Momstouch 20mm Flange and Duckbill Valve Compatible with Spectra S1 S2 9 Plus Breastpump Replacement to Spectra Pump Parts Not Original Replace Accessories.**Momstouch**$16.64**592 rev2y ago](https://www.amazon.com/dp/B0CKQJPVPL)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**MOOMentaneous 20mm Flange and Duckbill Valve Compatible with Spectra S1/S2 and 9 Plus Not Original Spectra Pump Parts Replacement**MOOMentaneous**$12.55**4.6★**▲ 92%**](https://www.amazon.com/dp/B0DJ2MZ2CX) [**Maymom Pump Parts Compatible with Spectra S2 S1 20mm Flange Valve Tube Bottle Backflow Protector Not Original Spectra S2 Replacement Pump Parts Duckbill Valve Bottle**Maymom**$32.49**4.6★**▲ 52%**](https://www.amazon.com/dp/B098D7F672) [**Gotocut 20mm Flange Kit Compatible with Spectra S1/S2/9 Plus/Motif Luna Includes Flange 20mm Bottles Tubing Valves and Backflow Protectors**Gotocut**$18.80**4.5★**▲ 49%**](https://www.amazon.com/dp/B0FGXWVND6) [**Spectra Baby USA - Single Breast Flange - Small / 20mm**SPECTRA**$14.39**4.8★**▲ 14%**](https://www.amazon.com/dp/B07CNT9XSP) [**Momstouch 20mm Flange and Duckbill Valve Compatible with Spectra S1 S2 9 Plus Breastpump Replacement to Spectra Pump Parts Not Original Replace Accessories.**Momstouch**$16.64**4.3★**— 0%**](https://www.amazon.com/dp/B0CKQJPVPL)
**~~View all trending →~~**
## **What buyers say about 20mm flange insert**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Size-Overall**22%
*“Perfect Fit”*
**Breastfeeding Friendly**15%
*“Works great with my Spectra breast pump”*
**Value For Money**15%
*“I have ordered this twice because I love the price point”*
**Quality-Overall**15%
*“Good quality”*
**Advertised Vs Actual Product**14%
*“Works as intended”*
**Sun Protection**8%
*“Does the job though it has low sunction”*
**Comfort-Overall**4%
*“have made pumping so much more comfortable”*
**Ease Of Cleaning**3%
*“I got these to have multiple sets so I don't have to wash after every use”*
### **What buyers complain about **
**Functionality-Overall**20%
*“Non functional”*
**Compatibility-Overall**15%
*“Not compatible with SpectraS1”*
**Size-Overall**15%
*“Didn't fit at all”*
**Leak-Proof**10%
*“resulting in spilled milk both times”*
**Quality-Overall**10%
*“Poor quality”*
**Noise Level**10%
*“It makes noises like air is escaping”*
**Durability**5%
*“When the same piece broke again on the second set”*
**Ease Of Use**5%
*“Unfortunately I cant use them”*
### **Top return reasons **
**Size-Overall**81%
**Width**6%
**Advertised Vs Actual Product**3%
**Functionality-Overall**2%
**Defective Material/Parts**2%
**Value For Money**1%
**Compatibility-Overall**1%
**Connectivity-Overall**1%
**Product Condition**1%
**Breastfeeding Friendly**0%
## **Common questions**
- **Is 20mm flange insert profitable to sell on Amazon United States?**
- The niche generates $125K/yr across 9 tracked products. 90-day search growth is -14.7%. Flapen's verdict: Skip it (33/100).
- **How competitive is the 20mm flange insert niche?**
- 6 brands and 12 sellers compete. The top 5 products take 89% of clicks and top 5 brands hold 98% of demand.
- **What do buyers complain about in 20mm flange insert?**
- Top complaints mined from reviews: Functionality-Overall, Compatibility-Overall, Size-Overall. The return rate is 5.9% — above our launch gate.
- **When does demand for 20mm flange insert peak?**
- Demand is steady year-round — the busiest month runs 1.2× the quietest.
- **What does it cost to enter the 20mm flange insert niche?**
- Listings span $8.78–$32.49; the average listing price is $17.28 (sweet spot $15–$100). The average incumbent carries 3,289 reviews — the moat a new listing must climb.
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