Spectra Flange 21mm
a concentrated shelf (top 5 take 78% of clicks) — Spectra Flange 21mm doesn't clear our bar today.
Flapen Score
Ranks 1,495 of 2,472 Baby Products niches · −3 vs the category median of 44
Is Spectra Flange 21mm profitable on Amazon?
According to Flapen's Amazon United States niche tracking, Spectra Flange 21mm is a $359K/yr Amazon United States market (135K searches/yr). The top 5 brands hold 91% of demand. Verdict: Skip it — 41/100.
Spectra Flange 21mm: the Amazon niche in one read
Everything a seller checks before entering, in three answers.
Is the demand real?
Not really. Search demand moved -11.5% over the last 90 days and 17.0% of searches end in a purchase.
$359K
revenue / yr
Who owns the niche?
The top 5 brands hold 91% of demand, so 9% of the market is open.
9%
open market share
Is there a way in?
Listing quality. The average product page scores 0/100 on content standards. Incumbents average 4.5★ — the gap to enter on.
0/100
page quality · 12 products
Top Spectra Flange 21mm products & what they sell for
Every tracked product — its share of the shelf, its review moat, and what it sells for.
Top sellers
by 90-day click share
Maymom 21mm Flange and Duckbill Valve Compatible with Spectra S1 S2 9 Plus Replacment Pump Parts Not Original Spectra Flange Duckbill Valve
- Price
- $18.80
- Rating
- 4.6/5
- Reviews
- 6,022
- Age
- 6y ago
Hranio Breast Pump Parts Compatible with 21mm Spectra Flange 21mm Spectra Replacement Pump Parts s1 s2 (Flange 21mm 2 Pcs)
- Price
- $9.80
- Rating
- 4.5/5
- Reviews
- 217
- Age
- 2y ago
Momstouch 21mm Flange and Duckbill Valve Compatible with Spectra S1 S2 9 Plus Breastpump Replacement to Spectra Pump Parts Not Original Replace Accessories.
- Price
- $16.74
- Rating
- 4.3/5
- Reviews
- 592
- Age
- 2y ago
Maymom Wide Neck Pump Part for Spectra S1/S2 Pumps; Incl Wide Mouth Flange; Not Original Spectra Flange; Replaces Spectra Shield (21 mm Two Flanges)
- Price
- $16.55
- Rating
- 4.7/5
- Reviews
- 7,932
- Age
- 8y ago
Flange Inserts 21mm Compatible with Medela/Spectra/TSRETE/Elvie/Momcozy/Bellababy Breast Pump 24mm Shields/Flanges Reduce 24mm Nipple Tunnel Down to 21 mm 4PCS
- Price
- $7.97
- Rating
- 4.5/5
- Reviews
- 971
- Age
- 2y ago
Trending
90-day click momentum
Pump Parts Compatible with Spectra S1/S2/9Plus/SG Breastpump Full Set Replacement Parts for Spectra Include 21mm Flange Duckbill Valve Backflow Protector Tube Bottle Not Original S1/S2 Accessories
- Price
- $20.08
- Rating
- 4.4/5
- Reviews
- 611
- Age
- 1y ago
BALIME 21MM Wide-Mouth Flange Spectra Replacement Pump Parts for S1 S2 - BPA Free Spectra Replacement Pump Parts - Perfect for Travel & Working Moms (2-Pack)
- Price
- $8.22
- Rating
- 4.4/5
- Reviews
- 129
- Age
- 1y ago
21mm Flange and Duckbill Valve for S1/S2/9+ Flange Inserts for Spectra Replacement Pump Parts (2-Pack) - Not Original Spectra Accessories
- Price
- $11.18
- Rating
- 4.3/5
- Reviews
- 75
- Age
- 1y ago
Maymom Wide Neck Pump Part for Spectra S1/S2 Pumps; Incl Wide Mouth Flange; Not Original Spectra Flange; Replaces Spectra Shield (21 mm Two Flanges)
- Price
- $16.55
- Rating
- 4.7/5
- Reviews
- 7,932
- Age
- 8y ago
Momstouch 21mm Flange Compatible with Spectra S1 S2 9 Plus Synergy Gold Breastpump Replacement to Spectra Pump Parts and Flange; Not Original; Replaces Shield
- Price
- $15.66
- Rating
- 4.6/5
- Reviews
- 301
- Age
- 2y ago
Newest
by launch date21mm Flange and Duckbill Valve for S1/S2/9+ Flange Inserts for Spectra Replacement Pump Parts (2-Pack) - Not Original Spectra Accessories
- Price
- $11.18
- Rating
- 4.3/5
- Reviews
- 75
- Age
- 1y ago
BALIME 21MM Wide-Mouth Flange Spectra Replacement Pump Parts for S1 S2 - BPA Free Spectra Replacement Pump Parts - Perfect for Travel & Working Moms (2-Pack)
- Price
- $8.22
- Rating
- 4.4/5
- Reviews
- 129
- Age
- 1y ago
Pump Parts Compatible with Spectra S1/S2/9Plus/SG Breastpump Full Set Replacement Parts for Spectra Include 21mm Flange Duckbill Valve Backflow Protector Tube Bottle Not Original S1/S2 Accessories
- Price
- $20.08
- Rating
- 4.4/5
- Reviews
- 611
- Age
- 1y ago
Hranio Breast Pump Parts Compatible with 21mm Spectra Flange 21mm Spectra Replacement Pump Parts s1 s2 (Flange 21mm 2 Pcs)
- Price
- $9.80
- Rating
- 4.5/5
- Reviews
- 217
- Age
- 2y ago
Flange Inserts 21mm Compatible with Medela/Spectra/TSRETE/Elvie/Momcozy/Bellababy Breast Pump 24mm Shields/Flanges Reduce 24mm Nipple Tunnel Down to 21 mm 4PCS
- Price
- $7.97
- Rating
- 4.5/5
- Reviews
- 971
- Age
- 2y ago
Competition: brands, sellers & click share
The top 5 products capture 78% of clicks — a locked-up shelf that new listings rarely crack.
Brands
9 rising
Sellers
18
Top-5 brand share
91%
Top 20: 100%
Top-5 click share
78%
Top 20: 100%
Open market
6%
- Maymom51%
- Momstouch16%
- Hranio13%
- Suniceme8%
- PUMPMOM-US4%
- MilkFlow3%
- Open — no brand owns it (3 brands, 6%)
Spectra Flange 21mm demand & seasonality
Weekly search volume, with the niche's key stats alongside.
No pronounced peak months · busiest ÷ quietest = 1.2×
Top Spectra Flange 21mm search terms shoppers use
The exact queries shoppers type, with yearly volume, growth and conversion.
- spectra flange 21mm28K/yr
- 21 mm flange spectra23K/yr
- 21mm flange spectra23K/yr
- spectra 21mm flange22K/yr
- spectra 21mm flange set12K/yr
- 21mm flange6K/yr
- 21 flange spectra6K/yr
- 21 mm flange3K/yr
- spectra s1 flange 21mm3K/yr
- spectra flanges 21mm2K/yr
What reviews say buyers love and hate about Spectra Flange 21mm
What buyers mention most, as a share of all reviews.
What buyers love
88% of reviews“fit my pump no problem”
“Amazing quality flanges”
“Exactly what I needed”
“Better fit, less discomfort, and a much more positive experience overall”
“Works great with my Spectra breast pump”
What buyers complain about
84% of reviews“they seem tiny”
“Absolutely Garbage”
“Works but not too well”
“Not comfortable”
“the material is not as soft”
Spectra Flange 21mm return rate & reasons
Why buyers send it back, as a share of all return requests.
6.0%
Return rate
83%
Fixable by listing
The "fixable" share counts expectation-mismatch reasons — size, look, advertised-vs-actual — that better copy and images address.
Common Spectra Flange 21mm questions
The questions sellers ask about this niche, answered from the tracked metrics.
Related niches
Same-category niches scoring near this one — the next ones worth researching.
Best Flapen score
The highest-scoring niches we track right now, across every category.
