15mm flange insert
Worth a lookShows searches that convert (16.8% search→purchase), but soft demand (+0.9% this quarter) keeps it on the watch list.
Conversion
Incredible16.8%search→purchase rate — share of searches ending in a sale
Price range
Good$6.97–$32.48cheapest to priciest tracked listing — scored on the share inside $15–$100
Avg price
Good$13.00avg 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
Returns
Okay4.2%return rate — above 6% kills the launch gate
Review moat
Okay2,601.08avg incumbent reviews — the moat a new listing must climb
Growth
Okay+0.9%90-day search growth — must beat 0% to launch
Competition
The top 5 products take 56% of clicks — established leaders, but buyers still shop beyond them.Brands
13 rising
Sellers
17
Top-5 brand share
77%
Open market
16%
- Maymom28%
- Suniceme22%
- BDICOVE10%
- Momstouch9%
- Momcozy8%
- IVARONAL7%
- Open — no brand owns it (7 brands, 16%)
Product shelf
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
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
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
Momcozy M5| M6| M9 Original Replacement Accessories Food-Grade Silicone & BPA Free Original Breastfeeding Parts Inserts 15mm 4 Pack
Momcozy$14.292,611 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$8.83253 rev
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
Trending
90-day click momentumFlange 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$9.744.4★
Momcozy M5| M6| M9 Original Replacement Accessories Food-Grade Silicone & BPA Free Original Breastfeeding Parts Inserts 15mm 4 Pack
Momcozy$14.294.3★
TOVVILD 15mm Flange Inserts for 24mm Flange/Shield Compatible with Momcozy/MOMMED/Spectra Breast Pumps Pump Parts Replace (4PCS 15mm)
TOVVILD$8.784.4★
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★
Momcozy Flange Insert 15mm Compatible with 24mm Flange/Shield of Most Pumps Fit for Momcozy S9Pro/S12Pro/S12Pro-Quick Replacement Accessories 4PCS 15mm
Momcozy$12.124.3★
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×
Reviews
What buyers praise and complain about, mined from review topics.What buyers love
“The best sizing kit”
“Good parts”
“Comfortable”
“The little cleaning sponge is wonderful”
“Good for the price”
“Easy to use”
“Very helpful and useful for breastfeeding”
“It performs exactly as intended”
“it is compatible”
“These are durable”
What buyers complain about
“These are huge”
“didn't work for me”
“Not well made”
“one of the flange inserts tore right apart immediately after opening”
“Incompatible with Elvie Stride”
“It has almost cost me my milk supply”
“Why did these come dirty”
“Very uncomfortable”
“Semi-useful”
“not the same material”