spectra adapter
Skip itA concentrated shelf (top 5 take 100% of clicks) — this niche doesn't clear our bar today.
Avg price
Great$19.07avg listing price — sweet spot $15–$100
Quality gap
Great4.2★avg incumbent rating — lower means beatable quality
Returns
Great1.6%return rate — above 6% kills the launch gate
Price range
Good$9.87–$24.77cheapest to priciest tracked listing — scored on the share inside $15–$100
Review moat
Good1,370avg incumbent reviews — the moat a new listing must climb
Growth
Bad-8.5%90-day search growth — must beat 0% to launch
Market size
Bad$77K$77K/yr · 269K searches
Conversion
Bad1.5%search→purchase rate — share of searches ending in a sale
Competition
Bad100%top-5 click share — a locked-up shelf
Brand share
Bad100%top-5 brand share — brand-locked demand
Competition
The top 5 products capture 100% of clicks — a locked-up shelf that new listings rarely crack.Brands
4 falling
Sellers
6
Top-5 brand share
100%
Open market
0%
- Pumpin' Pal79%
- Nursi Luna10%
- Maymom7%
- Legendairy Milk4%
- Open — no brand owns it (0%)
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 4 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Pumpin Pal X-Small Silicone Angled Breast Pump Flange Pair 2026 Design with Suction Sealing Rings Made in U.S.A.
Pumpin' Pal$24.283.0★2 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
Maymom Widemouth Connector 2pc Compatible w Spectra S1 Spectra S2 Pump; Compatible with Medela PersonalFit Shield Pumpin Pal Shield Lansinoh Flange Maymom MyFit Shields MyFit Crater Shield
Maymom$17.364.7★1,840 rev
Legendairy Milk Pumping Spray 4 oz. Helps Sore Nipples & Clogged Ducts Organic Lubricant for Breast Shields and Flanges Vegan Breast Pump Spray Natural & Lanolin-Free Made in USA
Legendairy Milk$24.774.5★1,557 rev
Newest
by launch datePumpin Pal X-Small Silicone Angled Breast Pump Flange Pair 2026 Design with Suction Sealing Rings Made in U.S.A.
Pumpin' Pal$24.282 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$9.872,081 rev
Legendairy Milk Pumping Spray 4 oz. Helps Sore Nipples & Clogged Ducts Organic Lubricant for Breast Shields and Flanges Vegan Breast Pump Spray Natural & Lanolin-Free Made in USA
Legendairy Milk$24.771,557 rev
Maymom Widemouth Connector 2pc Compatible w Spectra S1 Spectra S2 Pump; Compatible with Medela PersonalFit Shield Pumpin Pal Shield Lansinoh Flange Maymom MyFit Shields MyFit Crater Shield
Maymom$17.361,840 rev
Trending
90-day click momentumPumpin Pal X-Small Silicone Angled Breast Pump Flange Pair 2026 Design with Suction Sealing Rings Made in U.S.A.
Pumpin' Pal$24.283.0★
Maymom Widemouth Connector 2pc Compatible w Spectra S1 Spectra S2 Pump; Compatible with Medela PersonalFit Shield Pumpin Pal Shield Lansinoh Flange Maymom MyFit Shields MyFit Crater Shield
Maymom$17.364.7★
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★
Legendairy Milk Pumping Spray 4 oz. Helps Sore Nipples & Clogged Ducts Organic Lubricant for Breast Shields and Flanges Vegan Breast Pump Spray Natural & Lanolin-Free Made in USA
Legendairy Milk$24.774.5★
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -8.5% search growth over the last 90 days.Peak months: Nov · busiest ÷ quietest = 1.7×
Reviews
What buyers praise and complain about, mined from review topics.What buyers love
“Super useful to have all the sizes”
“I love how convenient it is to toss in my bag for on-the-go use”
“So comfortable”
“Perfect side and same quality with my breast pump”
“its less expensive”
“So easy to clean”
“seems durable enough for repeated use”
“it doesnt leave any residue of anything afterwards”
“has a really pleasant, mild scent”
“Easy application”
What buyers complain about
“Leaked EVERYWHERE”
“Disappointing for a $27 product”
“Size chart says to use the wrong size”
“Poor quality bottle”
“Slippery”
“later I kept smelling like a chemical smell”
“wipe it onto flange rather than spraying directly on it”
“They are very challenging to get on correctly”
“the whole bottle was oily”
“Not comfortable”