Spectra Flange 21mm
FailThe top 5 products take 78% of clicks, so Spectra Flange 21mm is a Fail.
- Flapen Score
- 41 / 100Ranks 1,495 of 2,472 Baby Products niches · −3 vs the category median of 4441
- Market size
- $359K/yr135K searches / yr
- 90-day growth
- -11.5%search demand this quarter
- Competition
- 78%top-5 click share · 9 brands · 18 sellers
Flapen Score
Spectra Flange 21mm against its category
The dotted line is the Baby Products average. Past it, Spectra Flange 21mm is stronger. Inside it, weaker.
Market
The Spectra Flange 21mm market on Amazon at a glance
Shoppers on Amazon United States searched for Spectra Flange 21mm 135K times last year and spent an estimated $359K. The top 5 brands take 91% of clicks. Flapen scores it 41 out of 100, a Fail.
01 · Demand
An estimated 17.0% of those searches ended in a purchase.
Shoppers searched for this 135K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 17.0% of those searches ended in a purchase. Searches in the last 90 days moved -11.5% against the 90 days before. Searches, conversion and average price together put the market at an estimated $359K a year.
- Searches, last 12 months
- 135K
- Growth, 90 days vs prior 90
- -11.5%
- Conversion, latest week
- 17.0%
- Market size, estimated
- $359Ka year
- Peak month
- January1.2× the quietest month
- Top search term
- spectra flange 21mm28K searches a year
02 · Price
A sale here is worth $15.66.
Listings sell for $15.66 on average, from $7.97 to $32.51. Amazon reports units sold in ranges. This niche sold 25K to 30K a year. The average listing sells 2,500 to 3,000 of them. At $15.66 that is $39K to $47K a year per listing.
- Average price
- $15.66inside the $15 to $100 sweet spot
- Price range
- $7.97–$32.51
- Amazon United States median price
- $24.38across 115,062 niches
- Units sold a year
- 25K–30K
- Units per listing a year
- 2,500–3,000
- Revenue per listing a year
- $39K–$47K
- Returns
- 6.0%of orders · Amazon United States median 2.1%
03 · Entry bar
The bar here is ads and reviews.
92% of listings pay for placement with sponsored ads. 100% ship with Prime. On an average day, 0.0% of listings are out of stock. The average listing ranks #68 within Breastfeeding. It carries 2,566 reviews at 4.51 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 92%
- Prime listings
- 100%
- Out of stock, average day
- 0.0%
- Average rank
- #68in Breastfeeding
- Average rating
- 4.51 starsAmazon United States average 4.42 stars
- Average reviews
- 2,566per listing
- Listings tracked
- 12
04 · Newcomers
Brands here are settling in.
The brands on the shelf have sold for 39 months on average, so the names here are settling in.
- Launched, last 12 months
- 0
- Successful launches
- 0Amazon's first-year sales bar
- Average brand age
- 39 months
Products
Top Spectra Flange 21mm products & what they sell for
The products selling here, as shoppers see them on Amazon. Shelf share and sales are our estimates.
Prices and ratings read from Amazon on Jul 12, 2026. The live listing can differ.
Top sellers
by estimated 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
estimated 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 date
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

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
Competition: brands, sellers & click share
The top 5 products take an estimated 78% of clicks. A locked shelf that new listings rarely crack.
Brands
9 rising
Sellers
18
Est. top-5 brand share
91%
Top 20: 100%
Est. 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%)
Demand
Spectra Flange 21mm search demand
Weekly searches over the year, seasonality beneath. Pick a range.
No pronounced peak months · busiest ÷ quietest = 1.2×
Search terms
Top Spectra Flange 21mm search terms shoppers use
The exact words shoppers type, with estimated 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
Reviews and returns
What reviews say buyers love and hate about Spectra Flange 21mm
We read the reviews and the return reasons for every product selling here.
“they seem tiny”
Every topic
Every topic buyers talk about, one row each.
Red shows the share of negative reviews and green the share of positive reviews, biggest topic first. Open a row to read what they wrote.
17 topics
Keep looking
Related niches
Niches in the same category that score near this one. Research these next.
Best Flapen score
The highest-scoring niches we track right now, across every category.
FAQ
Common Spectra Flange 21mm questions
Answered from the same tracked data.
Figures on this page are estimates modeled from public Amazon pages and third-party keyword data. Amazon does not supply them, and no connected seller's data is used. How we handle Amazon data









