Is 15mm flange insert profitable to sell on Amazon United States?

The niche generates $289K/yr across 24 tracked products. 2 of 3 products launched in the last 360 days are still selling. 90-day search growth is +0.9%. Flapen's verdict: Skip it (49/100).

How competitive is the 15mm flange insert niche?

13 brands and 17 sellers compete. The top 5 products take 56% of clicks and top 5 brands hold 77% of demand.

What do buyers complain about in 15mm flange insert?

Top complaints mined from reviews: Size-Overall, Functionality-Overall, Quality-Overall. The return rate is 4.2%.

When does demand for 15mm flange insert peak?

Demand is steady year-round — the busiest month runs 1.6× the quietest.

What does it cost to enter the 15mm flange insert niche?

Listings span $6.97–$32.48; the average listing price is $13.00 (sweet spot $15–$100). The average incumbent carries 2,601 reviews — the moat a new listing must climb.

15mm flange insert

Skip it

Soft demand (+0.9% this quarter) — this niche doesn't clear our bar today.

Conversion

Incredible16.8%

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

Price range

Good$6.97–$32.48

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

Avg price

Good$13.00

avg listing price — sweet spot $15–$100

Market size

Good$289K

$289K/yr · 132K searches

Competition

Okay56%

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

Brand share

Okay77%

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

Quality gap

Okay4.5★

avg incumbent rating — lower means beatable quality

Review moat

Okay2,601.08

avg incumbent reviews — the moat a new listing must climb

Returns

Okay4.2%

return rate — above 5% kills the launch gate

Growth

Okay+0.9%

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

According to Flapen's Amazon United States niche tracking, 15mm flange insert is a $289K/yr Amazon United States market (132K searches/yr). The top 5 brands hold 77% of demand. Verdict: Skip it — 49/100.

Data updated Jul 12, 2026 · scored weekly · How we score niches

15mm flange insert market data

Units sold / yr: 20K–25K; avg 1,000–1,250/product
Revenue / yr: $260K–$325K; units × avg price
Conversion rate: 16.8%
Avg BSR: #48
Page quality: 0%
Prime: 100%
Sponsored: 96%
Out of stock: 4.9%
Avg brand age: 33 months
Avg seller age: 172 days

Competition & brand share

The top 5 products take 56% of clicks — established leaders, but buyers still shop beyond them.

Brands

13 rising

Sellers

Top-5 brand share

77%

Top 20: 100%

Top-5 click share

56%

Top 20: 95%

Open market

16%

Maymom28%
Suniceme22%
BDICOVE10%
Momstouch9%
Momcozy8%
IVARONAL7%
Open — no brand owns it (7 brands, 16%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +0.9% search growth over the last 90 days.

No pronounced peak months · busiest ÷ quietest = 1.6×

Open Trend

Top 15mm flange insert search terms

15mm flange insert34K/yr +15.3%14.6% conv.
15 mm flange insert26K/yr +1.6%15.2% conv.
15mm flange spectra15K/yr -10.4%12.8% conv.
15 mm flange spectra10K/yr -5.3%13.9% conv.
spectra flange 15mm11K/yr -11.6%16.0% conv.
15mm flange7K/yr -2.2%9.8% conv.
momcozy flange inserts 15mm6K/yr -7.3%15.6% conv.
spectra 15mm flange5K/yr +7.8%17.8% conv.
spectra 15mm flange set5K/yr +4.6%16.5% conv.
15 mm flange4K/yr -11.9%9.6% conv.

All search terms

Top 15mm 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.

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

Flange Inserts 15mm Compatible with Medela/Spectra/TSRETE/Elvie/Momcozy/Bellababy Breast Pump 24mm Shields/Flanges Reduce 24mm Nipple Tunnel Down to 15 mm 4PCS

Suniceme$8.244.5★971 rev

Maymom 15mm 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$19.684.6★6,022 rev

Momstouch 15mm Flange and Duckbill Valve Compatible with Spectra S1 S2 9 Plus Breastpump Replacement to Spectra Pump Parts Not Original Replace Accessories.

Momstouch$16.714.3★592 rev

IVARONAL Flange Insert 2PCS 15mm Compatible with Momcozy M9/M6/M5/S12 Pro/V1 Pro/V2 pro Spectra/Medela/Elvie/NCVI/TSRETE/eufy/Lansinoh/Paruu/MomMed Breast Pump 24mm Shields/Flanges (2pcs-15mm)

IVARONAL$6.974.5★848 rev

6Pcs Breast Pump Flange Insert 15mm 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$8.834.5★253 rev

Newest

by launch date

Flange Inserts for Spectra Spectra Replacement Pump Parts for S1/S2/9 Plus Not Original Accessories Breast Pump Parts Include 2-Pack 15MM Flange and 4-Pack Duckbill Valves

CubCare$9.74119 rev

2mo ago

Momcozy Flange Insert 15mm Compatible with 24mm Flange/Shield of Most Pumps Fit for Momcozy S9Pro/S12Pro/S12Pro-Quick Replacement Accessories 4PCS 15mm

Momcozy$12.121,166 rev

5mo ago

Momcozy M5| M6| M9 Original Replacement Accessories Food-Grade Silicone & BPA Free Original Breastfeeding Parts Inserts 15mm 4 Pack

Momcozy$14.292,611 rev

10mo ago

6Pcs Breast Pump Flange Insert 15mm 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$8.83253 rev

1y ago

2 Packs 15mm Flange Set Updated Soft Rim Shield and Wide Mouth Base Connector Pump Parts for Spectra S2 Spectra S1 9 Plus Breastpumps Accessories 106 Degree Wider Opening Angel

IVARONAL$15.52170 rev

1y ago

What buyers say about 15mm flange insert

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

What buyers love

Size-Overall34%

“The best sizing kit”

Quality-Overall13%

“Good parts”

Comfort-Overall9%

“Comfortable”

Ease Of Cleaning7%

“The little cleaning sponge is wonderful”

Value For Money7%

“Good for the price”

Ease Of Use6%

“Easy to use”

Breastfeeding Friendly4%

“Very helpful and useful for breastfeeding”

Advertised Vs Actual Product4%

“It performs exactly as intended”

Compatibility-Overall4%

“it is compatible”

Durability3%

“These are durable”

What buyers complain about

Size-Overall28%

“These are huge”

Functionality-Overall8%

“didn't work for me”

Quality-Overall7%

“Not well made”

Durability5%

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

Compatibility-Overall4%

“Incompatible with Elvie Stride”

Value For Money4%

“It has almost cost me my milk supply”

Ease Of Cleaning3%

“Why did these come dirty”

Comfort-Overall2%

“Very uncomfortable”

Ease Of Use2%

“Semi-useful”

Material Quality2%

“not the same material”

Top return reasons

Size-Overall68%

Functionality-Overall6%

Advertised Vs Actual Product5%

Defective Material/Parts3%

Width2%