momcozy s12 pro flange insert
Skip itBrand-locked demand (top 5 brands take 93% of clicks) — this niche doesn't clear our bar today.
Price range
Good$6.92–$34.29cheapest to priciest tracked listing — scored on the share inside $15–$100
Conversion
Good5.7%search→purchase rate — share of searches ending in a sale
Quality gap
Good4.4★avg incumbent rating — lower means beatable quality
Avg price
Good$12.44avg listing price — sweet spot $15–$100
Competition
Good54%top-5 click share — leaders hold, buyers still browse
Review moat
Good1,416.17avg incumbent reviews — the moat a new listing must climb
Returns
Okay3.1%return rate — above 5% kills the launch gate
Growth
Bad-14.0%90-day search growth — must beat 0% to launch
Market size
Bad$70K$70K/yr · 98K searches
Brand share
Bad93%top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, momcozy s12 pro flange insert is a $70K/yr Amazon United States market (98K searches/yr). The top 5 brands hold 93% of demand. Demand peaks in Feb–Mar–Apr–May–Jun. Verdict: Skip it — 41/100.
Data updated Jul 12, 2026 · scored weekly · How we score niches
momcozy s12 pro flange insert market data
- Units sold / yr
- 6K–8K
- avg 250–500/product
- Revenue / yr
- $75K–$100K
- units × avg price
- Conversion rate
- 5.7%
- Avg BSR
- #38
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 92%
- Out of stock
- 14.4%
- Avg brand age
- 29 months
- Avg seller age
- 250 days
Competition & brand share
The top 5 products take 54% of clicks — established leaders, but buyers still shop beyond them.Brands
8 falling
Sellers
11
Top-5 brand share
93%
Top 20: 100%
Top-5 click share
54%
Top 20: 96%
Open market
2%
- Momcozy58%
- Nursi Luna11%
- IVARONAL10%
- LOTBILL8%
- Parner6%
- Nuliie5%
- Open — no brand owns it (2 brands, 2%)
Demand & seasonality
Weekly Amazon search volume, last 102 weeks — -14.0% search growth over the last 90 days.Peak months: Feb, Mar, Apr, May, Jun · busiest ÷ quietest = 4.7×
Top momcozy s12 pro flange insert search terms
- momcozy flange inserts38K/yr
- mom cozy flange inserts16K/yr
- momcozy flange10K/yr
- momcozy s12 pro flange8K/yr
- momcozy flange inserts 21mm5K/yr
- momcozy flanges4K/yr
- momcozy inserts3K/yr
- momcozy 21mm flange insert3K/yr
- mom cozy s12 pro flange inserts2K/yr
- momcozy s12 pro flange insert5K/yr
Top momcozy s12 pro 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 24 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Momcozy M5| M6| M9 Original Replacement Accessories Food-Grade Silicone & BPA Free Original Breastfeeding Parts Inserts 19mm 4 Pack
Momcozy$14.044.3★2,611 rev
Momcozy M5| M6| M9 Original Replacement Accessories Food-Grade Silicone & BPA Free Original Breastfeeding Parts Inserts 15/17/19/21mm
Momcozy$14.024.3★2,611 rev
Momcozy Flange Insert 15/17/19/21mm Compatible with 24mm Flange/Shield of Most Pumps Fit for Momcozy S9Pro/S12Pro/S12Pro-Quick Replacement Accessories 4PCS
Momcozy$11.984.3★1,166 rev
Flange Insert 13/15/17/19/21mm 10PCS Compatible with Momcozy S12 Pro/S9 Pro/S12/S9/Medela/Spectra etc Electric Breast Pump 24mm Flange/Shield Reduce 24mm Tunnel Down to Correct Size
LOTBILL$7.344.6★583 rev
Nursi Luna Flange Sizing Kit 3-in-1 with 13/15/17/19/21mm for 24mm Electric Breast Pump Flanges/Shields 10PCS Soft Silicone Flange Inserts for More Comfortable Pumping BPA-Free Essential for Moms
Nursi Luna$9.874.6★2,081 rev
Newest
by launch date
Momcozy Flange Insert 21mm Compatible with 24mm Flange/Shield of Most Pumps Fit for Momcozy S9Pro/S12Pro/S12Pro-Quick Replacement Accessories 4PCS 21mm
Momcozy$11.911,166 rev
Momcozy Flange Insert 19mm Compatible with 24mm Flange/Shield of Most Pumps Fit for Momcozy S9Pro/S12Pro/S12Pro-Quick Replacement Accessories 4PCS 19mm
Momcozy$12.021,166 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 Flange Insert 15/17/19/21mm Compatible with 24mm Flange/Shield of Most Pumps Fit for Momcozy S9Pro/S12Pro/S12Pro-Quick Replacement Accessories 4PCS
Momcozy$11.981,166 rev
Momcozy Original Replacement Accessories for Upgraded Mobile Flow | Upgraded M9 Original Upgraded M9 Breastfeeding Parts 24mm Flange 1 Pack
Momcozy$21.641,175 rev
Trending
90-day click momentumMomcozy Flange Insert 21mm Compatible with 24mm Flange/Shield of Most Pumps Fit for Momcozy S9Pro/S12Pro/S12Pro-Quick Replacement Accessories 4PCS 21mm
Momcozy$11.914.3★
Momcozy Pumping Bra for Wearable Breast Pump Nursing & Pumping Bra in One Hands Free Pump Bra Suitable for M5 S12 Pro etc Black
Momcozy$34.293.9★
Momcozy Original Replacement Accessories for Upgraded Mobile Flow | Upgraded M9 Original Upgraded M9 Breastfeeding Parts 24mm Flange 1 Pack
Momcozy$21.644.4★
Momcozy M5| M6| M9 Original Replacement Accessories Food-Grade Silicone & BPA Free Original Breastfeeding Parts Inserts 17mm 4 Pack
Momcozy$14.204.3★
Momcozy Flange Insert 19mm Compatible with 24mm Flange/Shield of Most Pumps Fit for Momcozy S9Pro/S12Pro/S12Pro-Quick Replacement Accessories 4PCS 19mm
Momcozy$12.024.3★
What buyers say about momcozy s12 pro flange insert
What buyers praise and complain about, mined from review topics.What buyers love
“Good variety of sizes”
“One thing that really stood out to me was how well-made”
“This made it so easy for me”
“So comfortable”
“Good price”
“As advertised”
“The little cleaning sponge is wonderful”
“Very helpful and useful for breastfeeding”
“Compatible with Frida Mom manual pump”
“durable”
What buyers complain about
“Does NOT fit”
“Breaks easily”
“Poor quality”
“Part Breaks”
“The parts are expensive”
“Won't work with momcozy M9”
“Very uncomfortable”
“Looks like it was opened previously”
“they are kind of a pain to insert and clean and the output isnt as good as just using the correct size pump accessory”
“Doesnt work for me”
Top return reasons
Common questions
- Is momcozy s12 pro flange insert profitable to sell on Amazon United States?
- The niche generates $70K/yr across 24 tracked products. 7 of 9 products launched in the last 360 days are still selling. 90-day search growth is -14.0%. Flapen's verdict: Skip it (41/100).
- How competitive is the momcozy s12 pro flange insert niche?
- 8 brands and 11 sellers compete. The top 5 products take 54% of clicks and top 5 brands hold 93% of demand.
- What do buyers complain about in momcozy s12 pro flange insert?
- Top complaints mined from reviews: Size-Overall, Durability, Quality-Overall. The return rate is 3.1%.
- When does demand for momcozy s12 pro flange insert peak?
- Demand peaks in Feb–Mar–Apr–May–Jun; the busiest month runs 4.7× the quietest.
- What does it cost to enter the momcozy s12 pro flange insert niche?
- Listings span $6.92–$34.29; the average listing price is $12.44 (sweet spot $15–$100). The average incumbent carries 1,416 reviews — the moat a new listing must climb.