---
title: "17mm flange spectra — Niche Verdict: Skip it (41/100) | Amazon United States - Flapen"
canonical_url: "https://flapen.com/amazon/research/us/baby-products/17mm-flange-spectra"
last_updated: "2026-07-14T00:25:23.203Z"
locale: en
meta:
  description: "a concentrated shelf (top 5 take 83% of clicks) — 17mm flange spectra doesn't clear our bar today."
  "og:description": "a concentrated shelf (top 5 take 83% of clicks) — 17mm flange spectra doesn't clear our bar today."
  "og:title": "17mm flange spectra — Niche Verdict: Skip it (41/100) | Amazon United States - Flapen"
---

Back to Flapen home

# **17mm flange spectra**

**Skip it**

A concentrated shelf (top 5 take 83% of clicks) — this niche doesn't clear our bar today.

Market size 53Growth 17Conversion 99Competition 14Returns 36Price range 76Avg price 78Brand share 19Review moat 36Quality gap 37

**Conversion**

**Incredible****18.7%**

search→purchase rate — share of searches ending in a sale

**Avg price**

**Great****$16.05**

avg listing price — sweet spot $15–$100

**Price range**

**Great****$9.65–$32.51**

cheapest to priciest tracked listing — scored on the share inside $15–$100

**Market size**

**Good****$334K**

$334K/yr · 111K searches

**Quality gap**

**Okay****4.5★**

avg incumbent rating — lower means beatable quality

**Review moat**

**Okay****2,933.91**

avg incumbent reviews — the moat a new listing must climb

**Returns**

**Okay****4.7%**

return rate — above 6% kills the launch gate

**Brand share**

**Bad****92%**

top-5 brand share — brand-locked demand

**Growth**

**Bad****-15.6%**

90-day search growth — must beat 0% to launch

**Competition**

**Bad****83%**

top-5 click share — a locked-up shelf

## **Competition**

The top 5 products capture 83% of clicks — a locked-up shelf that new listings rarely crack.

**Brands**

**8 **▲rising

**Sellers**

**9**

**Top-5 brand share**

**92%**

**Open market**

**5%**

- Maymom57% - Momstouch15% - NENESUPPLY10% - CubCare7% - afontoto4% - PUMPMOM-US3% - Open — no brand owns it (2 brands, 5%)

## **Product shelf**

Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.

0%10%$33K20%$67K30%$100K40%$134K1001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 11 tracked products in this niche — three views at once, no toggling.

### **Top sellers**

by 90-day click share

[1![Maymom 17mm Flange and Duckbill Valve Compatible with Spectra S1 S2 9 Plus Not Original Spectra S2 Replacement Pump Parts Flange Duckbill Valve](https://m.media-amazon.com/images/I/41dUJYFXe4L.jpg)**Maymom 17mm Flange and Duckbill Valve Compatible with Spectra S1 S2 9 Plus Not Original Spectra S2 Replacement Pump Parts Flange Duckbill Valve**Maymom**$19.76**4.6★6,022 rev](https://www.amazon.com/dp/B0B4RC1HF3) [2![Maymom 2x17 mm Wide Neck Pump Parts Compatible with Spectra S1/S2 Pumps; Incl Wide Mouth Flanges; Not Original Spectra Flange Shield (Two Small Flanges)](https://m.media-amazon.com/images/I/41lT-d2YMoL.jpg)**Maymom 2x17 mm Wide Neck Pump Parts Compatible with Spectra S1/S2 Pumps; Incl Wide Mouth Flanges; Not Original Spectra Flange Shield (Two Small Flanges)**Maymom**$16.77**4.8★3,464 rev](https://www.amazon.com/dp/B07PVJ8ZVM) [3![Momstouch 17mm Flange and Duckbill Valve Compatible with Spectra S1 S2 9 Plus Breastpump Replacement to Pump Parts Not Original Replace Accessories.](https://m.media-amazon.com/images/I/413OYHXNwZL.jpg)**Momstouch 17mm Flange and Duckbill Valve Compatible with Spectra S1 S2 9 Plus Breastpump Replacement to Pump Parts Not Original Replace Accessories.**Momstouch**$16.78**4.3★592 rev](https://www.amazon.com/dp/B0FC2BKZBW) [4![Nenesupply 17mm 2 pc Flanges Compatible with Spectra S2 S1 9 Plus Synergy Gold Breastpump Replacement to Spectra Pump Parts Flange Accessories Wide Mouth Work with Valve Backflow Protector Bottle](https://m.media-amazon.com/images/I/41lHNaivHbL.jpg)**Nenesupply 17mm 2 pc Flanges Compatible with Spectra S2 S1 9 Plus Synergy Gold Breastpump Replacement to Spectra Pump Parts Flange Accessories Wide Mouth Work with Valve Backflow Protector Bottle**NENESUPPLY**$12.33**4.7★3,324 rev](https://www.amazon.com/dp/B0B7458KHP) [5![Flange Inserts for Spectra Spectra Replacement Pump Parts for S1/S2/9 Plus Not Original Accessories Breast Pump Parts Include 2-Pack17MM Flanges and 4-Pack Duckbill Valves](https://m.media-amazon.com/images/I/41mvI3uAAzL.jpg)**Flange Inserts for Spectra Spectra Replacement Pump Parts for S1/S2/9 Plus Not Original Accessories Breast Pump Parts Include 2-Pack17MM Flanges and 4-Pack Duckbill Valves**CubCare**$9.97**4.4★119 rev](https://www.amazon.com/dp/B0FM8S5QZN)

**~~View all top sellers →~~**

### **Newest**

by launch date

[![Flange Inserts for Spectra Spectra Replacement Pump Parts for S1/S2/9 Plus Not Original Accessories Breast Pump Parts Include 2-Pack17MM Flanges and 4-Pack Duckbill Valves](https://m.media-amazon.com/images/I/41mvI3uAAzL.jpg)**Flange Inserts for Spectra Spectra Replacement Pump Parts for S1/S2/9 Plus Not Original Accessories Breast Pump Parts Include 2-Pack17MM Flanges and 4-Pack Duckbill Valves**CubCare**$9.97**119 rev11mo ago](https://www.amazon.com/dp/B0FM8S5QZN) [![Momstouch 17mm Flange and Duckbill Valve Compatible with Spectra S1 S2 9 Plus Breastpump Replacement to Pump Parts Not Original Replace Accessories.](https://m.media-amazon.com/images/I/413OYHXNwZL.jpg)**Momstouch 17mm Flange and Duckbill Valve Compatible with Spectra S1 S2 9 Plus Breastpump Replacement to Pump Parts Not Original Replace Accessories.**Momstouch**$16.78**592 rev11mo ago](https://www.amazon.com/dp/B0FC2BKZBW) [![17mm Flanges Compatible with Spectra S2 S1 9 Plus Synergy Gold Breastpump Not Original Spectra Replacement Pump Parts Wide Mouth Flange Accessories for Elastic Nipples Work with Backflow Protector](https://m.media-amazon.com/images/I/41RaX+cF5GL.jpg)**17mm Flanges Compatible with Spectra S2 S1 9 Plus Synergy Gold Breastpump Not Original Spectra Replacement Pump Parts Wide Mouth Flange Accessories for Elastic Nipples Work with Backflow Protector**afontoto**$9.65**112 rev1y ago](https://www.amazon.com/dp/B0FCBM6L2G) [![GOTOCUT 4PCS 17mm Breast Pump Flanges Compatible with Spectra S1/S2/9Plus/Synergy Gold Motif Luna Wide-Mouth Bottle Fit Breast Pump Accessories](https://m.media-amazon.com/images/I/41knLGt1kRL.jpg)**GOTOCUT 4PCS 17mm Breast Pump Flanges Compatible with Spectra S1/S2/9Plus/Synergy Gold Motif Luna Wide-Mouth Bottle Fit Breast Pump Accessories**Gotocut**$15.42**107 rev1y ago](https://www.amazon.com/dp/B0DK9GXR9X) [![PumpMom-us 17mm Oval Flanges with Soft Rim Compatible with Spectra S2 S1 9 Plus Breastpumps Accessories Replacement Breast Shield and Duckbill Valves for Spectra Pump Parts and Flange](https://m.media-amazon.com/images/I/51SvBNb04CL.jpg)**PumpMom-us 17mm Oval Flanges with Soft Rim Compatible with Spectra S2 S1 9 Plus Breastpumps Accessories Replacement Breast Shield and Duckbill Valves for Spectra Pump Parts and Flange**PUMPMOM-US**$16.77**915 rev2y ago](https://www.amazon.com/dp/B0D1P1BHJL)

**~~View all new products →~~**

### **Trending**

90-day click momentum

[![17mm Flanges Compatible with Spectra S2 S1 9 Plus Synergy Gold Breastpump Not Original Spectra Replacement Pump Parts Wide Mouth Flange Accessories for Elastic Nipples Work with Backflow Protector](https://m.media-amazon.com/images/I/41RaX+cF5GL.jpg)**17mm Flanges Compatible with Spectra S2 S1 9 Plus Synergy Gold Breastpump Not Original Spectra Replacement Pump Parts Wide Mouth Flange Accessories for Elastic Nipples Work with Backflow Protector**afontoto**$9.65**4.3★**▲ 84%**](https://www.amazon.com/dp/B0FCBM6L2G) [![Nenesupply 17mm 2 pc Flanges Compatible with Spectra S2 S1 9 Plus Synergy Gold Breastpump Replacement to Spectra Pump Parts Flange Accessories Wide Mouth Work with Valve Backflow Protector Bottle](https://m.media-amazon.com/images/I/41lHNaivHbL.jpg)**Nenesupply 17mm 2 pc Flanges Compatible with Spectra S2 S1 9 Plus Synergy Gold Breastpump Replacement to Spectra Pump Parts Flange Accessories Wide Mouth Work with Valve Backflow Protector Bottle**NENESUPPLY**$12.33**4.7★**▲ 65%**](https://www.amazon.com/dp/B0B7458KHP) [![Momstouch 17mm Flange and Duckbill Valve Compatible with Spectra S1 S2 9 Plus Breastpump Replacement to Pump Parts Not Original Replace Accessories.](https://m.media-amazon.com/images/I/413OYHXNwZL.jpg)**Momstouch 17mm Flange and Duckbill Valve Compatible with Spectra S1 S2 9 Plus Breastpump Replacement to Pump Parts Not Original Replace Accessories.**Momstouch**$16.78**4.3★**▲ 46%**](https://www.amazon.com/dp/B0FC2BKZBW) [![PumpMom-us 17mm Oval Flanges with Soft Rim Compatible with Spectra S2 S1 9 Plus Breastpumps Accessories Replacement Breast Shield and Duckbill Valves for Spectra Pump Parts and Flange](https://m.media-amazon.com/images/I/51SvBNb04CL.jpg)**PumpMom-us 17mm Oval Flanges with Soft Rim Compatible with Spectra S2 S1 9 Plus Breastpumps Accessories Replacement Breast Shield and Duckbill Valves for Spectra Pump Parts and Flange**PUMPMOM-US**$16.77**4.4★**▲ 30%**](https://www.amazon.com/dp/B0D1P1BHJL) [![Maymom 2x17 mm Wide Neck Pump Parts Compatible with Spectra S1/S2 Pumps; Incl Wide Mouth Flanges; Not Original Spectra Flange Shield (Two Small Flanges)](https://m.media-amazon.com/images/I/41lT-d2YMoL.jpg)**Maymom 2x17 mm Wide Neck Pump Parts Compatible with Spectra S1/S2 Pumps; Incl Wide Mouth Flanges; Not Original Spectra Flange Shield (Two Small Flanges)**Maymom**$16.77**4.8★**▲ 18%**](https://www.amazon.com/dp/B07PVJ8ZVM)

**~~View all trending →~~**

## **Demand & seasonality**

Weekly Amazon search volume, last 104 weeks — -15.6% search growth over the last 90 days.

4K3KPrime Day '25Spike '25Spike '26 seasonSepDecMarJunAugNovMarMay

No pronounced peak months · busiest ÷ quietest = 1.4×

## **Reviews**

What buyers praise and complain about, mined from review topics.

### **What buyers love **

**Size-Overall**46%

*“Fit perfect”*

**Quality-Overall**13%

*“Good Quality”*

**Value For Money**10%

*“Worth the buy”*

**Advertised Vs Actual Product**4%

*“just as well as the brand name”*

**Ease Of Use**4%

*“More convenient than inserts”*

**Compatibility-Overall**4%

*“Works well with Spectra”*

**Comfort-Overall**3%

*“They are very comfortable”*

**Ease Of Cleaning**3%

*“easy to clean”*

**Strength**2%

*“they are still going strong”*

**Soft Feel**1%

*“The material is soft”*

### **What buyers complain about **

**Size-Overall**13%

*“Not a great fit on rhe spectra bottles”*

**Durability**8%

*“Cracked in 2 weeks”*

**Noise Level**8%

*“None of them make this noise”*

**Value For Money**8%

*“Not worth it”*

**Functionality-Overall**8%

*“Does not work”*

**Quality-Overall**8%

*“the flanges did not seem like they should have made it past quality control”*

**Material Quality**4%

*“Probably the material is not as good to go through a steam sanitizer”*

**Ease Of Use**4%

*“I rather that than being too easy to slip in and out”*

**Allergies**4%

*“irritating my skin”*

**Leak-Proof**4%

*“There is some leaking around the flange when pouring because they arent a eufy product”*

### **Top return reasons **

**Size-Overall**81%

**Width**4%

**Advertised Vs Actual Product**3%

**Functionality-Overall**3%

**Defective Material/Parts**2%

**Value For Money**1%

**Compatibility-Overall**1%

**Comfort-Overall**1%

**Material Quality**1%

**Shape/Style**1%