---
title: "spectra flange 28mm — Niche Verdict: Skip it (36/100) | Amazon United States - Flapen"
canonical_url: "https://flapen.com/amazon/research/us/baby-products/spectra-flange-28mm"
last_updated: "2026-07-14T05:19:32.482Z"
locale: en
meta:
  description: "a small market ($29K/yr) — spectra flange 28mm doesn't clear our bar today."
  "og:description": "a small market ($29K/yr) — spectra flange 28mm doesn't clear our bar today."
  "og:title": "spectra flange 28mm — Niche Verdict: Skip it (36/100) | Amazon United States - Flapen"
---

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# **spectra flange 28mm**

**Skip it**

A small market ($29K/yr) — this niche doesn't clear our bar today.

Market size 7Growth 23Conversion 96Competition 19Returns 13Price range 86Avg price 95Brand share 19Review moat 48Quality gap 45

**Conversion**

**Incredible****14.2%**

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

**Avg price**

**Incredible****$24.56**

avg listing price — sweet spot $15–$100

**Price range**

**Great****$9.01–$64.47**

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

**Review moat**

**Okay****1,684.71**

avg incumbent reviews — the moat a new listing must climb

**Quality gap**

**Okay****4.5★**

avg incumbent rating — lower means beatable quality

**Growth**

**Bad****-3.3%**

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

**Competition**

**Bad****77%**

top-5 click share — a locked-up shelf

**Brand share**

**Bad****93%**

top-5 brand share — brand-locked demand

**Returns**

**Bad****8.8%**

return rate — above 6% kills the launch gate

**Market size**

**Bad****$29K**

$29K/yr · 8K searches

## **Competition**

The top 5 products capture 77% of clicks — a locked-up shelf that new listings rarely crack.

**Brands**

**9 **▲rising

**Sellers**

**15**

**Top-5 brand share**

**93%**

**Open market**

**5%**

- Momstouch34% - SPECTRA29% - Maymom24% - MilkFlow4% - BALIME2% - MOOMentaneous2% - Open — no brand owns it (3 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%$3K20%$6K30%$9K40%$12K101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales

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

All 14 tracked products in this niche — three views at once, no toggling.

### **Top sellers**

by 90-day click share

[1![Momstouch 28mm Flange and Duckbill Valve Compatible with Spectra S1 S2 9 Plus Breastpump Replacement to Spectra Pump Parts Not Original Replace Accessories.](https://m.media-amazon.com/images/I/41Hz5oIPKcL.jpg)**Momstouch 28mm Flange and Duckbill Valve Compatible with Spectra S1 S2 9 Plus Breastpump Replacement to Spectra Pump Parts Not Original Replace Accessories.**Momstouch**$16.58**4.3★592 rev](https://www.amazon.com/dp/B0CKQK4CD6) [2![Maymom Pump Parts Compatible with Spectra S2 S1 28mm Flange Tube Bottle Backflow Protector Valve Not Original Spectra S2 Replacement Pump Parts Duckbill Valve Bottle](https://m.media-amazon.com/images/I/41iQN2KiTDL.jpg)**Maymom Pump Parts Compatible with Spectra S2 S1 28mm Flange Tube Bottle Backflow Protector Valve Not Original Spectra S2 Replacement Pump Parts Duckbill Valve Bottle**Maymom**$32.14**4.6★9,124 rev](https://www.amazon.com/dp/B07LBPTMGC) [3![Spectra - Wide Breast Shield Set for Breast Milk Pumps - Large 28mm](https://m.media-amazon.com/images/I/31RdKnzUZIL.jpg)**Spectra - Wide Breast Shield Set for Breast Milk Pumps - Large 28mm**SPECTRA**$22.28**4.6★1,312 rev](https://www.amazon.com/dp/B01AFLQKXO) [4![Spectra - Premium Breast Milk Pump Accessory Kit with Baby Bottles - Large 28mm - Breast Pump Accessories - 2 Pack](https://m.media-amazon.com/images/I/31-lrP4IoxL.jpg)**Spectra - Premium Breast Milk Pump Accessory Kit with Baby Bottles - Large 28mm - Breast Pump Accessories - 2 Pack**SPECTRA**$64.47**4.7★742 rev](https://www.amazon.com/dp/B0F67JHJM7) [5![Momstouch 28mm Flange Compatible with Spectra S1 S2 9 Plus Synergy Gold Breastpump Replacement to Spectra Pump Parts and Flange; Not Original; Replaces Shield](https://m.media-amazon.com/images/I/410LIPMuu8L.jpg)**Momstouch 28mm Flange Compatible with Spectra S1 S2 9 Plus Synergy Gold Breastpump Replacement to Spectra Pump Parts and Flange; Not Original; Replaces Shield**Momstouch**$15.46**4.6★301 rev](https://www.amazon.com/dp/B0CM629XT2)

**~~View all top sellers →~~**

### **Newest**

by launch date

[![Pump Parts 4PCS Replacement Kit for Spectra S1/S2/S9 Plus/Synergy Gold Includes 28mm Flanges Duckbill Valves Backflow Protectors Tubes & Bottles (Not Original Accessories)](https://m.media-amazon.com/images/I/51xauha-afL.jpg)**Pump Parts 4PCS Replacement Kit for Spectra S1/S2/S9 Plus/Synergy Gold Includes 28mm Flanges Duckbill Valves Backflow Protectors Tubes & Bottles (Not Original Accessories)**MilkFlow**$38.11**69 rev6mo ago](https://www.amazon.com/dp/B0FTYNM2LF) [![28mm Flange Pump Parts Compatible with Spectra S1/S2/9Plus Not Original Spectra S2 Replacement Pump Parts Full Set Replacement Kit Include 28mm Flange Duckbill Valve Backflow Protector Tube Bottle](https://m.media-amazon.com/images/I/418Wz+Kx+XL.jpg)**28mm Flange Pump Parts Compatible with Spectra S1/S2/9Plus Not Original Spectra S2 Replacement Pump Parts Full Set Replacement Kit Include 28mm Flange Duckbill Valve Backflow Protector Tube Bottle**afontoto**$20.47**611 rev7mo ago](https://www.amazon.com/dp/B0G3WBRCWQ) [![Pump Replacement Parts Compatible with Spectra S1/S2/9 Plus Not Original Accessories Full Set Include 28mm Flanges Valves Tubings and BottlesBackflow Protectors and Duckbills](https://m.media-amazon.com/images/I/510JTbTGNoL.jpg)**Pump Replacement Parts Compatible with Spectra S1/S2/9 Plus Not Original Accessories Full Set Include 28mm Flanges Valves Tubings and BottlesBackflow Protectors and Duckbills**MilkFlow**$20.43**378 rev10mo ago](https://www.amazon.com/dp/B0FQ33DK53) [![4 Full Pump Parts Kits for Spectra S1/S2/9 Plus/Synergy Gold Replacement Kit for Spectra Pump Parts 4PC Include 28mm Flange Duckbill Valve Tube Bottle Backflow Protector Not Original Accessories](https://m.media-amazon.com/images/I/418c-G2nJFL.jpg)**4 Full Pump Parts Kits for Spectra S1/S2/9 Plus/Synergy Gold Replacement Kit for Spectra Pump Parts 4PC Include 28mm Flange Duckbill Valve Tube Bottle Backflow Protector Not Original Accessories**IVARONAL**$34.96**194 rev11mo ago](https://www.amazon.com/dp/B0FLXD37MH) [![BALIME Pump Parts Compatible with Spectra S1/S2/9 Plus 2Pcs Duckbill Valves and 2Pcs 28mm Flange (Not Original Spectra Accessories)](https://m.media-amazon.com/images/I/41jStsF6hBL.jpg)**BALIME Pump Parts Compatible with Spectra S1/S2/9 Plus 2Pcs Duckbill Valves and 2Pcs 28mm Flange (Not Original Spectra Accessories)**BALIME**$10.30**129 rev11mo ago](https://www.amazon.com/dp/B0FK276F7X)

**~~View all new products →~~**

### **Trending**

90-day click momentum

[![28mm Flange Pump Parts Compatible with Spectra S1/S2/9Plus Not Original Spectra S2 Replacement Pump Parts Full Set Replacement Kit Include 28mm Flange Duckbill Valve Backflow Protector Tube Bottle](https://m.media-amazon.com/images/I/418Wz+Kx+XL.jpg)**28mm Flange Pump Parts Compatible with Spectra S1/S2/9Plus Not Original Spectra S2 Replacement Pump Parts Full Set Replacement Kit Include 28mm Flange Duckbill Valve Backflow Protector Tube Bottle**afontoto**$20.47**4.4★**▲ 195%**](https://www.amazon.com/dp/B0G3WBRCWQ) [![Pump Replacement Parts Compatible with Spectra S1/S2/9 Plus Not Original Accessories Full Set Include 28mm Flanges Valves Tubings and BottlesBackflow Protectors and Duckbills](https://m.media-amazon.com/images/I/510JTbTGNoL.jpg)**Pump Replacement Parts Compatible with Spectra S1/S2/9 Plus Not Original Accessories Full Set Include 28mm Flanges Valves Tubings and BottlesBackflow Protectors and Duckbills**MilkFlow**$20.43**4.4★**▲ 131%**](https://www.amazon.com/dp/B0FQ33DK53) [![Spectra - Premium Breast Milk Pump Accessory Kit with Baby Bottles - Large 28mm - Breast Pump Accessories - 2 Pack](https://m.media-amazon.com/images/I/31-lrP4IoxL.jpg)**Spectra - Premium Breast Milk Pump Accessory Kit with Baby Bottles - Large 28mm - Breast Pump Accessories - 2 Pack**SPECTRA**$64.47**4.7★**▲ 124%**](https://www.amazon.com/dp/B0F67JHJM7) [![KAIYIV 28mm Flanges Compatible with Spectra S1/S2/9 Plus/Synergy Gold Wide Neck Pump Replacement Parts Not Original Spectra Flange (2 PCS)](https://m.media-amazon.com/images/I/418QUnRsjpL.jpg)**KAIYIV 28mm Flanges Compatible with Spectra S1/S2/9 Plus/Synergy Gold Wide Neck Pump Replacement Parts Not Original Spectra Flange (2 PCS)**KAIYIV**$9.01**4.4★**▲ 106%**](https://www.amazon.com/dp/B0FF5BQC5G) [![Momstouch 28mm Flange Compatible with Spectra S1 S2 9 Plus Synergy Gold Breastpump Replacement to Spectra Pump Parts and Flange; Not Original; Replaces Shield](https://m.media-amazon.com/images/I/410LIPMuu8L.jpg)**Momstouch 28mm Flange Compatible with Spectra S1 S2 9 Plus Synergy Gold Breastpump Replacement to Spectra Pump Parts and Flange; Not Original; Replaces Shield**Momstouch**$15.46**4.6★**▲ 64%**](https://www.amazon.com/dp/B0CM629XT2)

**~~View all trending →~~**

## **Demand & seasonality**

Weekly Amazon search volume, last 101 weeks — -3.3% search growth over the last 90 days.

400300Prime Day '24Spike '26 seasonDecMarJunAugNovMarMay

Peak months: Aug · busiest ÷ quietest = 1.6×

## **Reviews**

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

### **What buyers love **

**Size-Overall**43%

*“fit best if you kept this kit together”*

**Compatibility-Overall**14%

*“They work perfect with my Spectra S1 breast pump”*

**Quality-Overall**14%

*“Great quality”*

**Color**7%

*“Great with Spectra blue”*

**Value For Money**7%

*“Great value replacement parts”*

**Advertised Vs Actual Product**7%

*“This product is as advertised”*

### **What buyers complain about **

**Defective Material/Parts**33%

*“Does not include parts needed to use”*

**Functionality-Overall**33%

*“The duckbills I received arent working at all”*

**Connectivity-Overall**17%

*“However the tubing comes disconnected from the back flow protector pretty easily and often”*

### **Top return reasons **

**Size-Overall**76%

**Width**5%

**Advertised Vs Actual Product**5%

**Defective Material/Parts**5%

**Value For Money**2%

**Functionality-Overall**2%

**Leak-Proof**1%

**Quality-Overall**1%

**Material Quality**1%

**Breastfeeding Friendly**1%