Best Selling Spectra Replacement Pump Parts 21mm: See Top Product Rankings by Sales Volume & Market Trends

July 2026
122 Products Tracked

Looking for the most popular spectra replacement pump parts 21mm 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 replacement pump parts 21mm." 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 replacement pump parts 21mm market with 10K monthly sales, followed closely by B0CKZH37FX with 8K 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/sold8K
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%
Spectra - Duckbill Valve Replacement for Breast Milk Pump (Pack of 2) - Fits Small, Medium, Large, or X-Large Breast Shields and Flanges
#2
B071VP23ZX
$14.99·
4.7
Spectra - Duckbill Valve Replacement for Breast Milk Pump (Pack of 2) - Fits Small, Medium, Large, or X-Large Breast Shields and Flanges
Units/sold
2K100.0%

Top Selling Spectra Replacement Pump Parts 21mm

As of July 2026, we analyzed 122 tracked products in Amazon's "spectra replacement pump parts 21mm" 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 2,000 and 10,000 monthly sales. B0CMPBBHMZ leads the spectra replacement pump parts 21mm market with an estimated 10,000 monthly sales, up 11.1% from the previous month.

122Products Tracked
4,000Top 10 Avg. Sales
$19.42Top 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
4.1K
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
8,000 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
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%
5
[6-Count] Papablic Duckbill Valves, Replacement Milk Valves Compatible with Spectra S1 S2 & Medela Breast Pumps Parts Accessories, BPA & DEHP Free, Food-Grade Silicone, Easy to Clean, White
B07WHHQN6R
$8.49
4.6 (5.2K)
[6-Count] Papablic Duckbill Valves, Replacement Milk Valves Compatible with Spectra S1 S2 & Medela Breast Pumps Parts Accessories, BPA & DEHP Free, Food-Grade Silicone, Easy to Clean, White
3,000 Units Sold/mo▲ 2.0%
10
NENESUPPLY Handsfree Wearable Breast Milk Collection Cups Compatible with Spectra S1 S2 Baby Buddha Momcozy V1 Lansinoh Pumps 24mm Silicone Flanges Replacement for Spectra Pump Parts 19mm 21mm inserts
B0DWMM5M7F
$59.99
4.4 (1.7K)
NENESUPPLY Handsfree Wearable Breast Milk Collection Cups Compatible with Spectra S1 S2 Baby Buddha Momcozy V1 Lansinoh Pumps 24mm Silicone Flanges Replacement for Spectra Pump Parts 19mm 21mm inserts
2,000 Units Sold/mo▲ 100.0%
View All 122 Products & Deep InsightsGet full access to sales data, trends, and market analysis

For sellers and category managers benchmarking the spectra replacement pump parts 21mm price landscape, we segmented all 122 tracked listings in Amazon's live "spectra replacement pump parts 21mm" 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 replacement pump parts 21mm price zone, absorbing 47% of the assortment (170 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 replacement pump parts 21mm category.

Top 3 Price Tiers

$10.00 ~ $20.00 is the most competitive price tier, containing 47% of tracked products.

Sweet Spot
$10.00 ~ $20.00
Tier 1
47%
170 products

Top products in this price tier

#1
B0CMPBBHMZ
$9.99
10k Units Sold/mo
Unlock Top Performers
#2
$0.00 ~ $10.00
Tier 2
28%
101 products
$20.00 ~ $50.00
Tier 3
21%
75 products
$50.00 ~ $100.00
4%
Unlock to view all price tier distributions and their ASIN sales contributions

"Spectra replacement pump parts 21mm" Search Volume and Market Trends on Amazon

Amazon keyword search volume data for "spectra replacement pump parts 21mm" 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 replacement pump parts 21mm" was approximately 159 searches. The keyword currently holds an Amazon Search Frequency Rank (SFR) of #1,088,160, dropping 199,450 positions from the previous week. Additionally, the top 3 products for this keyword capture 54.9% of the total click share and 45.5% of the conversion share, indicating the level of market concentration.

Amazon Search Term
Weekly

spectra replacement pump parts 21mm

ASINSIGHT
Search Frequency Rank
1,088,160
199,450
Search Volume
159
19.7%
Top 3 Click Share
54.9%
Top 3 Conv. Share
45.5%

Search Volume Trend

Past 3 Years
Past 4 Months
Recent 8 months
Weekly Search Volume
159
View full trends for the past 3 years
JunJulAugSepOctNovDecJanFebMarAprMayJun
Multi-Dimensional Data

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