Spectra Flange Market Report: Sales Volume, Market Share, Leading Brands & Market Trends
Spectra Flange sales on Amazon US totaled 77,700 units in July 2026 (▼ 0.6% vs. the prior month), generating an estimated $1,309,589 in revenue across the 50 top-ranked ASINs for this search term. Demand is heavily concentrated at the top of the ranking — the ten best performers capture 55.3% of unit volume and 43.1% of revenue, while a typical listing is priced at $18.92. The keyword itself pulled 19,076 Amazon queries over the same period (▲ 5.6% MoM).
Zooming out to the 12-month window ending July 2026, the spectra flange Top 50 moved 810,450 units and $12,935,713 in cumulative sales — an average of 67,538 units and $1,077,976 per month. Monthly throughput topped out at 81,450 units in August 2025 and dipped to 46,800 in May 2026, leaving the latest reading 4.6% lower than August 2025.
Spectra Flange Sales Trend (Trailing 12 Months)
Based on the top 50 ASINs by monthly sales for this keyword
2025/08
2025/09
2025/10
2025/11
2025/12
2026/01
2026/02
2026/03
2026/04
2026/05
2026/06
2026/07
Monthly Sales 2026/07
77.7K
▼ 0.6% MoM
Monthly Revenue 2026/07
$1.3M
▲ 0.1% MoM
Top 10 Market Share 2026/07
55.3%
Spectra Flange Market Share & Sales Concentration on Amazon US — July 2026
The most-sold spectra flange listing on Amazon US in July 2026 is ASIN B0CMPBBHMZ (Brand: Nuliie), which sold 10,000 units at $9.99 apiece — equal to 12.9% of every unit tracked in this report and 43% ahead of the No. 2 listing.
The Top 10 ASINs account for 43,000 units and $564,990 in July 2026 — 55.3% of unit volume and 43.1% of revenue among all 50 ranked ASINs in this report.
Sales Volume of Top ASINs for 'Spectra Flange' on Amazon
July 2026









Is 55.3% Top 10 share highly concentrated?
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Top 5 Volume Share breakdown

B0CMPBBHMZ
Nuliie Silicone Flange Inserts 13/15/17/19/21mm 10PCS for 24mm Breast Pump | Compatible with Spectra, Includes Nipple Sizer for Flanges for Accurate Sizing, Boosts Pumping Efficiency & Comfort, BPA-free
10K
▲ 0.0%vs. prior month
$99.9K
latest month
12-month trend

B0CKZH37FX
Nursi Luna Flange Sizing Kit, Flange Inserts for 24mm Breast Pumps, 10PCS | 13/15/17/19/21mm, Compatible with Spectra & Medela, Nipple Sizer for Flanges to Find the Right Fit, Comfortable Pumping
7K
▼ 12.5%vs. prior month
$69.9K
latest month
12-month trend

B0CY81WHD5
Nursi Luna Flange Sizing Kit for 24mm Breast Pumps, 10PCS | 13/15/17/19/21mm Flange Inserts, Nipple Measurement Tool, Fit Electric & Manual Pumps, Soft Silicone, Comfortable Pumping
6K
▲ 0.0%vs. prior month
$59.9K
latest month
12-month trend

B0CSYR8JG2
PUMPMOM-US Breast Pump Parts for Spectra, Replace Duckbill Valves Tubes Backflow Protector Membrane for Spectra S1 S2 9 Plus Breastpumps
5K
▼ 16.7%vs. prior month
$81.8K
latest month
12-month trend

B08MWQQN6W
Legendairy Milk Duckbill Valves for Spectra Breast Pumps, 6 Ct, BPA-Free | Pink food-grade silicone valves with pull tabs fit Spectra, Medela, Motif, BabyBuddha & Zomee; easy to clean, strong suction.
4K
▲ 33.3%vs. prior month
$52K
latest month
12-month trend

B07WD385MM
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
3K
▲ 0.0%vs. prior month
$52.5K
latest month
12-month trend
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Best Spectra Flange Brands on Amazon US — Top 3 Brand Sales Concentration (July 2026)
Nursi Luna is the best-performing spectra flange brand in July 2026, moving 13,000 units across 2 ASINs for 30.2% of Top 10 volume. Nuliie follows with 10,000 units (23.3%), ahead of Maymom on 9,000 units (20.9%).
With 6 brands splitting the Top 10 and 74.4% of volume sitting with three of them, this is a concentrated shelf — the leaders hold multiple listings or one very high-velocity ASIN, so a new entrant competes against established review moats rather than an open field. Average selling prices among the leaders run from $9.99 to $18.84, which frames the price band a competing listing has to justify.
Brand share of Top 10 volume
Nursi Luna
2 ASINs in Top 10
30.2%
Units
13K
Revenue
$129.9K
Avg. price
$9.99

B0CKZH37FX
$9.99·★4.5·2.2K revsNursi Luna Flange Sizing Kit, Flange Inserts for 24mm Breast Pumps, 10PCS | 13/15/17/19/21mm, Compatible with Spectra & Medela, Nipple Sizer for Flanges to Find the Right Fit, Comfortable Pumping
Units sold7K
B0CY81WHD5
$9.99·★4.6·2.2K revsNursi Luna Flange Sizing Kit for 24mm Breast Pumps, 10PCS | 13/15/17/19/21mm Flange Inserts, Nipple Measurement Tool, Fit Electric & Manual Pumps, Soft Silicone, Comfortable Pumping
Units sold6K
Nuliie
1 ASIN in Top 10
23.3%
Units
10K
Revenue
$99.9K
Avg. price
$9.99

B0CMPBBHMZ
$9.99·★4.6·4.5K revsNuliie Silicone Flange Inserts 13/15/17/19/21mm 10PCS for 24mm Breast Pump | Compatible with Spectra, Includes Nipple Sizer for Flanges for Accurate Sizing, Boosts Pumping Efficiency & Comfort, BPA-free
Units sold10K
Maymom
4 ASINs in Top 10
20.9%
Units
9K
Revenue
$170.5K
Avg. price
$18.84

B07WD385MM
$17.49·★4.7·1.9K revsMaymom 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
Units sold3K
B07LBD522D
$29.99·★4.6·9.2K revsMaymom Pump Parts Compatible with Spectra S2 S1 Replacement Kit for Spectra Pump Parts 24 mm Flange Duckbill Valve Tube Bottle Backflow Protector, Not Original S2 S1 Accessories
Units sold2K
B07SNHJPX1
$8.90·★4.7·9.7K revsMaymom Duckbill Valves Compatible with Spectra S1 S2 9 Plus Dew 350 Not Original Spectra Pump Parts S2 Accessories Replace Valve (White, 6ct)
Units sold2K
B0863MVC1T
$18.98·★4.6·6.1K revsMaymom 19mm Flange and Duckbill Valve Compatible with Spectra S1 S2 Breastpump Not Original S2 Accessories Not Original Spectra Replacement Duckbill Valve and Flange
Units sold2K
Trending Spectra Flange Products — Growth Leaders & New Top 10 Entrants
Based on July 2026 data, this shortlist surfaces the two kinds of ASIN worth keeping an eye on — the ones that just broke into the Top 10, and the ones growing fastest month over month. Specifically, one ASIN forced its way in: B07SNHJPX1 booked 2K units at $8.90, with ▲ 100.0% MoM change. On the growth side, B0BLCYPBG7 leads positive momentum with ▲ 100.0% MoM growth on 2K units, with B0BKH4TX4J close behind at ▲ 75.0% MoM on 700 units.
The two signals carry different weight. A fresh entrant means share has already changed hands — an incumbent gave up its place to make room, so any competitive set drawn up a month ago is now out of date. A steep growth rate works as the earlier warning: it marks demand that is still compounding, usually a month or two before the ranking catches up to it.

B07SNHJPX1
Maymom Duckbill Valves Compatible with Spectra S1 S2 9 Plus Dew 350 Not Original Spectra Pump Parts S2 Accessories Replace Valve (White, 6ct)
Price
$8.90
Rating
4.7
Reviews
9.7K
Latest month sales

B0BLCYPBG7
Maymom 18mm 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
Price
$19.98
Rating
4.6
Reviews
6.1K
Latest month sales

B0BKH4TX4J
Flange Inserts 13/15/17/19/21mm 5pcs,Suitable for Medela,Spectra 24mm Shields/Flanges,Compatible with Momcozy S12 Pro/S9 Pro/S9/S12 Wearable Breast Pump,Reduce 24mm Tunnel Down to Correct Size
Unlock to view ASIN details and product titles
Price
$7.99
Rating
4.3
Reviews
2.1K
Latest month sales
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