15mm flange spectra
Skip itBrand-locked demand (top 5 brands take 95% of clicks) — this niche doesn't clear our bar today.
Conversion
Incredible17.8%search→purchase rate — share of searches ending in a sale
Avg price
Great$15.74avg listing price — sweet spot $15–$100
Price range
Good$8.24–$32.48cheapest to priciest tracked listing — scored on the share inside $15–$100
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Market size
Okay$167K$167K/yr · 59K searches
Review moat
Okay3,627avg incumbent reviews — the moat a new listing must climb
Returns
Okay5.7%return rate — above 6% kills the launch gate
Growth
Bad-6.1%90-day search growth — must beat 0% to launch
Competition
Bad75%top-5 click share — a locked-up shelf
Brand share
Bad95%top-5 brand share — brand-locked demand
Competition
The top 5 products capture 75% of clicks — a locked-up shelf that new listings rarely crack.Brands
7 rising
Sellers
9
Top-5 brand share
95%
Open market
3%
- Maymom62%
- Momstouch17%
- NENESUPPLY8%
- Suniceme5%
- IVARONAL4%
- CubCare3%
- Open — no brand owns it (1 brand, 3%)
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
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
Maymom 15mm Wide Neck Pump Part for Spectra S1/S2 Pumps; Compatible with Syngergy Gold Motif Luna Pumps; Incl Wide Mouth Flange; Not Original Spectra Flange; Replaces Spectra Shield
Maymom$17.164.7★7,932 rev
Nenesupply 15mm 2 pc Flanges Compatible with Spectra S2 S1 9 Plus Synergy Gold Breastpump Replacement to Spectra Pump Parts Flange Accessories Wide Mouth Work with Valve Backflow Protector Bottle
NENESUPPLY$12.044.7★3,324 rev
15mm Maymom MyFit Shields Pano Series; Compatible with Medela Breast Pump- PersonalFit Freestyle Harmony Maxi Freestyle Flex Connector; Connect to Maymom Widemouth/Narrow Connector 2pcs
Maymom$15.594.5★8,889 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
BALIME Pump Parts Compatible with Spectra S1/S2/9 Plus 2Pcs Duckbill Valves and 2Pcs 15mm Flange (Not Original Spectra Accessories)
BALIME$10.10129 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
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$8.24971 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$16.71592 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★
15mm Maymom MyFit Shields Pano Series; Compatible with Medela Breast Pump- PersonalFit Freestyle Harmony Maxi Freestyle Flex Connector; Connect to Maymom Widemouth/Narrow Connector 2pcs
Maymom$15.594.5★
Maymom 15mm Wide Neck Pump Part for Spectra S1/S2 Pumps; Compatible with Syngergy Gold Motif Luna Pumps; Incl Wide Mouth Flange; Not Original Spectra Flange; Replaces Spectra Shield
Maymom$17.164.7★
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$15.523.9★
BALIME Pump Parts Compatible with Spectra S1/S2/9 Plus 2Pcs Duckbill Valves and 2Pcs 15mm Flange (Not Original Spectra Accessories)
BALIME$10.104.4★
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -6.1% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.3×
Reviews
What buyers praise and complain about, mined from review topics.What buyers love
“Fits spectra”
“Comfortable”
“easy to clean”
“omg these made it so much easier”
“Just what I needed”
“These are durable”
“it is compatible”
“Great quality”
“Helps my milk production”
What buyers complain about
“the backflow pieces do not fit”
“they did not work great”
“Not well made”
“constant hot water washes”
“If they dont seal *just right* then you end up with a silent leak”
“It is very hard to clean”
“do not lock in place or stay screwed on”
“Both rims broke off the flange within a few weeks”
“The description says that its supportive of spectra pumps but the backflow pieces do not fit!!”
“It has almost cost me my milk supply”