Best Selling Spectra 21mm Flange Set: See Top Product Rankings by Sales Volume & Market Trends

July 2026
127 Products Tracked

Looking for the most popular spectra 21mm flange set products in the market? Our report leverages real Amazon monthly sales data to identify the best-performing products and the fastest-growing opportunities within the search results for the keyword "spectra 21mm flange set." Whether you're searching for winning products to launch or monitoring market trends and competitor performance, this report provides the insights you need.

Based on monthly sales analytics, our Shoppers' Top Picks highlights that ASIN B0CMPBBHMZ currently leads the spectra 21mm flange set market with 10K monthly sales, followed closely by B0CKZH37FX with 7K monthly sales and B0CSYR8JG2 with 6K monthly sales. Meanwhile, ASIN B0CSYR8JG2 stands out as the fastest-growing product, achieving an impressive 100.0% month-over-month sales growth. By tracking competitor sales performance and shifts in market demand, sellers can uncover emerging opportunities and make more informed product and marketing decisions.

🏆Shoppers' Top PicksAmazon
by monthly sales July 2026
Nuliie 3-in-1 Flange Sizing Kit 13/15/17/19/21mm for 24mm Electric Double Breast Pump Flange/Shield, 10PCS Silicone Flange Inserts to Boost Pumping Efficiency & Comfort, BPA-Free Essential for Moms
1
B0CMPBBHMZ
$9.99·
4.6
Units/sold10K
Nursi Luna Flange Inserts 10PCS 13/15/17/19/21mm for 24mm Flanges/Shield of Most Pumps, Flange Sizing Kit Silicone Flanges Insert, Breastfeeding Essentials Kit for New Moms
2
B0CKZH37FX
$9.99·
4.6
Units/sold7K
PumpMom-us Breast Pump Parts for Spectra, Replace Duckbill Valves Tubes Backflow Protector Membrane for Spectra S1 S2 9 Plus Breastpumps
3
B0CSYR8JG2
$16.13·
4.7
Units/sold6K
🚀Fastest Growing
by MoM sales growth
PumpMom-us Breast Pump Parts for Spectra, Replace Duckbill Valves Tubes Backflow Protector Membrane for Spectra S1 S2 9 Plus Breastpumps
#1
B0CSYR8JG2
$16.13·
4.7
PumpMom-us Breast Pump Parts for Spectra, Replace Duckbill Valves Tubes Backflow Protector Membrane for Spectra S1 S2 9 Plus Breastpumps
Units/sold
6K100.0%
Maymom 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
#2
B07LBD522D
$32.99·
4.6
Maymom 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/sold
2K100.0%

Top Selling Spectra 21mm Flange Set

As of July 2026, we analyzed 127 tracked products in Amazon's "spectra 21mm flange set" search results and generated the following sales chart and product rankings based on monthly sales data. The ranking below highlights the Top 10 products by estimated monthly sales. According to the latest data, these products generated between 1,000 and 10,000 monthly sales. B0CMPBBHMZ leads the spectra 21mm flange set market with an estimated 10,000 monthly sales, up 11.1% from the previous month.

127Products Tracked
4,300Top 10 Avg. Sales
$15.45Top 10 Avg. Price
4.6Top 10 Avg. Rating
🏆
Nuliie 3-in-1 Flange Sizing Kit 13/15/17/19/21mm for 24mm Electric Double Breast Pump Flange/Shield, 10PCS Silicone Flange Inserts to Boost Pumping Efficiency & Comfort, BPA-Free Essential for Moms
#1
B0CMPBBHMZ

Nuliie 3-in-1 Flange Sizing Kit 13/15/17/19/21mm for 24mm Electric Double Breast Pump Flange/Shield, 10PCS Silicone Flange Inserts to Boost Pumping Efficiency & Comfort, BPA-Free Essential for Moms

10,000
▲ 11.1%
Units Sold/mo
$9.99
Price
4.6
Rating
4.2K
Reviews
2
Nursi Luna Flange Inserts 10PCS 13/15/17/19/21mm for 24mm Flanges/Shield of Most Pumps, Flange Sizing Kit Silicone Flanges Insert, Breastfeeding Essentials Kit for New Moms
B0CKZH37FX
$9.99
4.6 (2K)
Nursi Luna Flange Inserts 10PCS 13/15/17/19/21mm for 24mm Flanges/Shield of Most Pumps, Flange Sizing Kit Silicone Flanges Insert, Breastfeeding Essentials Kit for New Moms
7,000 Units Sold/mo▲ 1.7%
3
PumpMom-us Breast Pump Parts for Spectra, Replace Duckbill Valves Tubes Backflow Protector Membrane for Spectra S1 S2 9 Plus Breastpumps
B0CSYR8JG2
$16.13
4.7 (1.1K)
PumpMom-us Breast Pump Parts for Spectra, Replace Duckbill Valves Tubes Backflow Protector Membrane for Spectra S1 S2 9 Plus Breastpumps
6,000 Units Sold/mo▲ 100.0%
4
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
B0CY81WHD5
$9.99
4.6 (2.1K)
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
6,000 Units Sold/mo▲ 50.0%
5
Spectra - Wide Neck Baby Bottles - Compatible with Spectra Breast Milk Pump Flanges (Pack of 2)
B00OHO74AE
$15.49
4.7 (6.3K)
Spectra - Wide Neck Baby Bottles - Compatible with Spectra Breast Milk Pump Flanges (Pack of 2)
3,000 Units Sold/mo▲ 50.0%
10
SPECTRA Duckbill Valve Replacement for Breast Milk Pump (Pack of 2) - Fits Small, Medium, Large, or X-Large Breast Shields and Flanges
B071VP23ZX
$14.99
4.7 (3.9K)
SPECTRA Duckbill Valve Replacement for Breast Milk Pump (Pack of 2) - Fits Small, Medium, Large, or X-Large Breast Shields and Flanges
1,000 Units Sold/mo▲ 100.0%
View All 127 Products & Deep InsightsGet full access to sales data, trends, and market analysis

For sellers and category managers benchmarking the spectra 21mm flange set price landscape, we segmented all 127 tracked listings in Amazon's live "spectra 21mm flange set" search results across the full price spectrum, and surfaced the top 3 price tiers by share below to highlight where competition concentrates and where pricing gaps exist.

Leading the distribution, the $10.00 ~ $20.00 band is the category's best spectra 21mm flange set price zone, absorbing 46% of the assortment (153 products) — this is where listing density is highest and where new entrants face the steepest competition for share-of-voice. Use the tier breakdown below to identify the top-ranking ASIN, monthly sales velocity, and rating profile within each band — essential inputs for pricing strategy, sourcing decisions, and competitive benchmarking in the spectra 21mm flange set category.

Top 3 Price Tiers

$10.00 ~ $20.00 is the most competitive price tier, containing 46% of tracked products.

Sweet Spot
$10.00 ~ $20.00
Tier 1
46%
153 products

Top products in this price tier

#1
B0CMPBBHMZ
$9.99
10k Units Sold/mo
Unlock Top Performers
#2
$20.00 ~ $50.00
Tier 2
24%
79 products
$0.00 ~ $10.00
Tier 3
23%
78 products
$50.00 ~ $100.00
5%
Unlock to view all price tier distributions and their ASIN sales contributions

"Spectra 21mm flange set" Search Volume and Market Trends on Amazon

Amazon keyword search volume data for "spectra 21mm flange set" in the US marketplace. This report provides insights into keyword search volume, Amazon search trends, competition levels, and conversion efficiency for sellers and brands.

During the week of 2026-06-21 to 2026-06-27, the Amazon USweekly search volume for "spectra 21mm flange set" was approximately 180 searches. The keyword currently holds an Amazon Search Frequency Rank (SFR) of #971,542, dropping 204,462 positions from the previous week. Additionally, the top 3 products for this keyword capture 66.3% of the total click share and 69.6% of the conversion share, indicating the level of market concentration.

Amazon Search Term
Weekly

spectra 21mm flange set

ASINSIGHT
Search Frequency Rank
971,542
204,462
Search Volume
180
22.4%
Top 3 Click Share
66.3%
Top 3 Conv. Share
69.6%

Search Volume Trend

Past 3 Years
Past 4 Months
Recent 8 months
Weekly Search Volume
180
View full trends for the past 3 years
JunJulAugSepOctNovDecJanFebMarAprMayJun
Multi-Dimensional Data

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