17mm flange insert
Skip itA concentrated shelf (top 5 take 81% of clicks) — this niche doesn't clear our bar today.
Conversion
Incredible15.5%search→purchase rate — share of searches ending in a sale
Review moat
Okay1,818.75avg incumbent reviews — the moat a new listing must climb
Returns
Okay3.9%return rate — above 6% kills the launch gate
Avg price
Okay$10.88avg listing price — sweet spot $15–$100
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Growth
Okay+7.3%90-day search growth — must beat 0% to launch
Brand share
Okay84%top-5 brand share — brands hold most of the demand
Market size
Okay$150K$150K/yr · 89K searches
Price range
Bad$6.58–$16.78cheapest to priciest tracked listing — scored on the share inside $15–$100
Competition
Bad81%top-5 click share — a locked-up shelf
Competition
The top 5 products capture 81% of clicks — a locked-up shelf that new listings rarely crack.Brands
9 falling
Sellers
11
Top-5 brand share
84%
Open market
10%
- Suniceme37%
- Hranio30%
- Momstouch6%
- Maymom6%
- Nuliie6%
- GOCROWEEN5%
- Open — no brand owns it (3 brands, 10%)
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 12 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Suniceme Flange Inserts 17mm Compatible with Medela/Spectra/TSRETE/Elvie/Momcozy/Bellababy Breast Pump 24mm Shields/Flanges Reduce 24mm Nipple Tunnel Down to 17 mm 4PCS
Suniceme$8.024.5★971 rev
17mm Flange Insert 6PC Compatible with 17mm Flange Spectra/Flange Inserts for Spectra/Momcozy Flange Inserts/Momcozy Wearable Breast Pump Flange Insert/Flange Inserts for Medela Pump/Willow/TSRETE
Hranio$9.994.5★562 rev
Flange Inserts 17mm 8PC Compatible with Momcozy S12 pro/S9 pro/S9/S10/S12/Medela/TSRETE/Spectra/Bellababy etc 24mm Wearable Breast Pump Reduce 24mm Tunnel Down to Correct Size
GOCROWEEN$8.004.6★347 rev
4Pcs Breast Pump Flange Insert 17mm 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$7.874.5★635 rev
Maymom Flange 17mm Insert Compatible with Medela/Spectra/Elvie/momcozy/tsrete/Willow/Motif Luna/Ameda MYA Breastpump 24mm Breast Shields. Reduce 24mm Niple Tunnel Down to 17mm
Maymom$14.704.5★3,517 rev
Newest
by launch date
Momstouch 17mm Flange and Duckbill Valve Compatible with Spectra S1 S2 9 Plus Breastpump Replacement to Pump Parts Not Original Replace Accessories.
Momstouch$16.78592 rev
4Pcs Breast Pump Flange Insert 17mm 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$7.87635 rev
Suniceme Flange Inserts 17mm Compatible with Medela/Spectra/TSRETE/Elvie/Momcozy/Bellababy Breast Pump 24mm Shields/Flanges Reduce 24mm Nipple Tunnel Down to 17 mm 4PCS
Suniceme$8.02971 rev
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$10.052,006 rev
Nuliie 8PCS Silicone Flanges Insert Replacement Kit Flange Sizing Kit 17mm for 24mm Flange/Shield Breast Pumps Pumping Essential Kit for Moms
Nuliie$8.464,179 rev
Trending
90-day click momentum
2PCS Flange Insert 17mm Compatible with Medela/Spectra/Willow/TSRETE/Momcozy S9/S12/S9Pro/S12Pro Breastpump 24mm Shields Reduce 24mm Nipple Tunnel Down to Correct Size Pump Parts Replace
Smarbore$6.584.6★
4Pcs Breast Pump Flange Insert 17mm 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$7.874.5★
Momstouch 17mm Flange and Duckbill Valve Compatible with Spectra S1 S2 9 Plus Breastpump Replacement to Pump Parts Not Original Replace Accessories.
Momstouch$16.784.3★
Flange Inserts 17mm 8PC Compatible with Momcozy S12 pro/S9 pro/S9/S10/S12/Medela/TSRETE/Spectra/Bellababy etc 24mm Wearable Breast Pump Reduce 24mm Tunnel Down to Correct Size
GOCROWEEN$8.004.6★
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$10.054.6★
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +7.3% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.5×
Reviews
What buyers praise and complain about, mined from review topics.What buyers love
“Sizing seemed accurate”
“One thing that really stood out to me was how well-made”
“Great price”
“They are very comfortable”
“The little cleaning sponge is wonderful”
“Easy to use”
“Very helpful and useful for breastfeeding”
“they are exactly as described”
“durable”
“Compatible with Frida Mom manual pump”
What buyers complain about
“Need more sizes”
“Got sent used & dirty flanges”
“Would expect higher quality control from a company who is knowingly serving pregnant and postpartum women”
“one of the flange inserts tore right apart immediately after opening”
“Incompatible with Elvie Stride”
“Why did these come dirty”
“Very uncomfortable”
“did not work for me”
“Waste of money”
“after I try to remove it, it sticks/ pinches and pulls at my boon and nipple”