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
Avg price
Okay$10.88avg listing price — sweet spot $15–$100
Returns
Okay3.9%return rate — above 5% kills the launch gate
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
According to Flapen's Amazon United States niche tracking, 17mm flange insert is a $150K/yr Amazon United States market (89K searches/yr). The top 5 brands hold 84% of demand. Verdict: Skip it — 38/100.
Data updated Jul 12, 2026 · scored weekly · How we score niches
17mm flange insert market data
- Units sold / yr
- 13K–15K
- avg 1,250–1,500/product
- Revenue / yr
- $136K–$163K
- units × avg price
- Conversion rate
- 15.5%
- Avg BSR
- #47
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 92%
- Out of stock
- 9.1%
- Avg brand age
- 32 months
- Avg seller age
- 273 days
Competition & brand share
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%
Top 20: 100%
Top-5 click share
81%
Top 20: 100%
Open market
10%
- Suniceme37%
- Hranio30%
- Momstouch6%
- Maymom6%
- Nuliie6%
- GOCROWEEN5%
- Open — no brand owns it (3 brands, 10%)
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×
Top 17mm flange insert search terms
- 17mm flange insert49K/yr
- 17 mm flange inserts28K/yr
- size 17 flange inserts5K/yr
- flange inserts 17mm3K/yr
- 17 flange inserts2K/yr
- 17mm flange insert spectra2K/yr
Top 17mm 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.
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★
What buyers say about 17mm flange insert
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”
Top return reasons
Common questions
- Is 17mm flange insert profitable to sell on Amazon United States?
- The niche generates $150K/yr across 12 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is +7.3%. Flapen's verdict: Skip it (38/100).
- How competitive is the 17mm flange insert niche?
- 9 brands and 11 sellers compete. The top 5 products take 81% of clicks and top 5 brands hold 84% of demand.
- What do buyers complain about in 17mm flange insert?
- Top complaints mined from reviews: Size-Overall, Product Condition, Quality-Overall. The return rate is 3.9%.
- When does demand for 17mm flange insert peak?
- Demand is steady year-round — the busiest month runs 1.5× the quietest.
- What does it cost to enter the 17mm flange insert niche?
- Listings span $6.58–$16.78; the average listing price is $10.88 (sweet spot $15–$100). The average incumbent carries 1,819 reviews — the moat a new listing must climb.