medela valves and membranes set
Skip itBrand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.
Avg price
Great$22.37avg listing price — sweet spot $15–$100
Price range
Great$9.56–$61.24cheapest to priciest tracked listing — scored on the share inside $15–$100
Conversion
Great9.5%search→purchase rate — share of searches ending in a sale
Returns
Good2.8%return rate — above 6% kills the launch gate
Review moat
Okay2,992.08avg incumbent reviews — the moat a new listing must climb
Market size
Okay$121K$121K/yr · 57K searches
Growth
Bad-3.3%90-day search growth — must beat 0% to launch
Competition
Bad75%top-5 click share — a locked-up shelf
Quality gap
Bad4.7★avg incumbent rating — lower means beatable quality
Brand share
Bad100%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
4 rising
Sellers
15
Top-5 brand share
100%
Open market
0%
- Medela67%
- Maymom17%
- NENESUPPLY14%
- CozyBabe3%
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
Medela Symphony Breast Pump Kit Double Pumping System Includes Everything Needed to Start Pumping with Symphony Made Without BPA
Medela$41.534.7★1,437 rev
Medela Spare Valves and Membranes 2 Sets Authentic Medela Replacement Parts Designed for All Breast Pumps Except Sonata and Freestyle Made Without BPA
Medela$9.564.8★5,346 rev
Maymom Pump Parts Compatible with Medela Symphony 19mm Flange (Detachable Shield and Connector) Not Original Medela Symphony Replacement Pump Parts Tube Cap Membrane Valve
Maymom$26.685.0★1 rev
Nenesupply Pump Parts with 24mm Flanges Compatible with Medela Pump in Style Parts Accessories Breast Pump Not Original Medela Pump Parts Incl. 24mm Flange Breastshield Connector Valve Membrane Tubing
NENESUPPLY$19.234.6★1,149 rev
2X One-piece Breastshields Valves Membranes Compatible with Medela Pump Parts Pump in Style Lactina Symphony Swing; 24 mm Standard breastshields; Made by Maymom
Maymom$13.654.4★6,786 rev
Newest
by launch date
Two Complete Sets Compatible with Medela Symphony Breast Pump Replacement Parts (24mm Two Complete Sets with 17/19/21mm Flanges)
CozyBabe$61.247 rev
Maymom Pump Parts Compatible with Medela Symphony 19mm Flange (Detachable Shield and Connector) Not Original Medela Symphony Replacement Pump Parts Tube Cap Membrane Valve
Maymom$26.681 rev
Nenesupply Membranes Valves Compatible with Medela Breast Pump Parts Not Original Medela Membrane Replacement Parts Accessories Compatible with Pump in Style Parts Symphony Harmony Hand Pump
NENESUPPLY$9.862,585 rev
2X One-piece Breastshields Valves Membranes Compatible with Medela Pump Parts Pump in Style Lactina Symphony Swing; 24 mm Standard breastshields; Made by Maymom
Maymom$13.656,786 rev
Medela Symphony Protective Cap & Membranes.
Medela$26.6455 rev
Trending
90-day click momentumTwo Complete Sets Compatible with Medela Symphony Breast Pump Replacement Parts (24mm Two Complete Sets with 17/19/21mm Flanges)
CozyBabe$61.244.8★
Maymom Pump Parts Compatible with Medela Symphony 19mm Flange (Detachable Shield and Connector) Not Original Medela Symphony Replacement Pump Parts Tube Cap Membrane Valve
Maymom$26.685.0★
Nenesupply Pump Parts with 24mm Flanges Compatible with Medela Pump in Style Parts Accessories Breast Pump Not Original Medela Pump Parts Incl. 24mm Flange Breastshield Connector Valve Membrane Tubing
NENESUPPLY$19.234.6★
2X One-piece Breastshields Valves Membranes Compatible with Medela Pump Parts Pump in Style Lactina Symphony Swing; 24 mm Standard breastshields; Made by Maymom
Maymom$13.654.4★
Medela Symphony Protective Cap & Membranes.
Medela$26.644.6★
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -3.3% search growth over the last 90 days.Peak months: Sep, Oct · busiest ÷ quietest = 1.7×
Reviews
What buyers praise and complain about, mined from review topics.What buyers love
“Great quality”
“Great value”
“Great way to store breastmilk”
“Fits perfectly”
“easy to use”
“easy to clean”
“As described”
“theyre compatible with both”
“they dont leak”
“Saver life”
What buyers complain about
“is not compatible”
“I felt they were kind of pricey”
“spilled breast milk because there wasn't a tight seal”
“Bottles were used previously as they had some wear on it”
“Only gave three stars because I found the measuring lines hard to read”
“Cleaning pump pieces often can be a hassle”
“One of the pieces cracked within a week of using”
“One of the pieces cracked within a week of using”
“Unfortunately, they were too small and did not”