---
title: "3ml Cartridge for Insulin Pen — $75K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/health-household/3ml-cartridge-for-insulin-pen"
last_updated: "2026-08-09T03:53:49.199Z"
locale: en
meta:
description: "Niche score 67/100 · $75K/yr market · 37K searches/yr. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 67/100 · $75K/yr market · 37K searches/yr. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:title": "3ml Cartridge for Insulin Pen — $75K/yr Amazon US Niche (2026) - Flapen"
---
# **3ml cartridge for insulin pen**
**Worth a look**
Shows a thin review moat (50 avg reviews), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Market size 19Growth 80Conversion 85Competition 64Returns 98Price range 81Avg price 90Brand share 69Review moat 98Quality gap 40
**Review moat**
**Incredible****49.56**
avg incumbent reviews — the moat a new listing must climb
**Returns**
**Incredible****0.4%**
return rate — above 5% kills the launch gate
**Avg price**
**Great****$20.82**
avg listing price — sweet spot $15–$100
**Conversion**
**Great****9.6%**
search→purchase rate — share of searches ending in a sale
**Price range**
**Great****$7.71–$50.27**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Growth**
**Great****+71.9%**
90-day search growth — must beat 0% to launch
**Brand share**
**Good****64%**
top-5 brand share — brands hold most of the demand
**Competition**
**Good****47%**
top-5 click share — leaders hold, buyers still browse
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Market size**
**Bad****$75K**
$75K/yr · 37K searches
**Signals**[** Low Review Barrier**](https://flapen.com/research/niches?market=us&signal=low_review_barrier "Top brand's reviews < 500") [** Out of Stock**](https://flapen.com/research/niches?market=us&signal=out_of_stock "OOS rate > 10%")
According to Flapen's Amazon United States niche tracking, 3ml cartridge for insulin pen is a $75K/yr Amazon United States market (37K searches/yr). The top 5 brands hold 64% of demand. Verdict: Worth a look — 67/100.
Data updated Jul 10, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **3ml cartridge for insulin pen market data**
- **Units sold / yr**
- **3K–4K**
- avg 100–250/product
- **Revenue / yr**
- **$62K–$83K**
- units × avg price
- **Conversion rate**
- **9.6%**
- **Avg BSR**
- **#51**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **93%**
- **Out of stock**
- **11.0%**
- **Avg brand age**
- **26 months**
- **Avg seller age**
- **154 days**
## **Competition & brand share**
The top 5 products take 47% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**15 **▲rising
**Sellers**
**18**
**Top-5 brand share**
**64%**
Top 20: 100%
**Top-5 click share**
**47%**
Top 20: 91%
**Open market**
**28%**
- Goffing22% - HFEOIEN16% - LZHNB10% - hyddeb8% - DOKIBI8% - Generic8%
## **Demand**
Weekly Amazon search volume, last 12 weeks — +71.9% search growth over the last 90 days.
1K750Spike '26Apr '26May '26May '26May '26Jun '26Jun '26
[**Open Trend **](https://flapen.com/research/us/health-household/3ml-cartridge-for-insulin-pen/trend)
## **Top 3ml cartridge for insulin pen search terms**
- **3ml cartridge for peptide pen**6K/yr+326.6%9.2% conv. - **3ml pen cartridge**7K/yr+76.8%8.4% conv. - **peptide pen cartridge**7K/yr+115.2%11.7% conv. - **insulin pen cartridge**9K/yr+33.9%7.8% conv. - **insulin cartridge**5K/yr+18.7%2.8% conv. - **3ml cartridge for insulin pen**5K/yr-89.6%10.5% conv. [**All search terms **](https://flapen.com/research/us/health-household/3ml-cartridge-for-insulin-pen/search-terms)
## **Top 3ml cartridge for insulin pen products on Amazon**
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
0%5%$4K10%$7K15%$11K20%$15K1101001K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 24 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**3ml Pen Cartridge - 3cc Cartridges for Peptide V1-V2 Pens Individually Wrapped 10Pack**Goffing**$16.02**4.8★101 rev](https://www.amazon.com/dp/B0G3GLK8BB) [2**3ml Pen Cartridge 3ml Cartridge for Peptide Pen Peptide Pen Cartridge Fit for V1 V2 Pens 3cc Empty Glass Cartridge with 11mm Long Stopper Individually Wrapped. (Clear(10Pcs))**HFEOIEN**$13.90**4.3★32 rev](https://www.amazon.com/dp/B0GX582KFF) [3**3 ML Pen Cartridge Individually Sterilized Packaged for V1-V2 Pen Cartridges 50 Pack**LZHNB**$50.27**4.7★49 rev](https://www.amazon.com/dp/B0G3H29G5L) [4**3ml Pen Peptide Glass Replacement Peptide Pen Cartridges Compatible with V1 & V2 Pens Individually Packaged. (Clear5Pack)**HFEOIEN**$9.82**4.1★30 rev](https://www.amazon.com/dp/B0GRMZSN3K) [5**3ml Pen Cartridge Individually Packaged - 3 ml Glass Peptide Pen Cartridges for V1 & V2 Pens Pack of 10**DOKIBI**$15.95**4.5★66 rev](https://www.amazon.com/dp/B0G3PF9S5V)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**3mL Cartridge for V1-V2 Pens 10 Pack 3cc Peptide Pen Cartridges with 11mm Smooth Stopper Individually Sterilized Packaged**Ferissvo**$16.05**22 rev1mo ago](https://www.amazon.com/dp/B0H1WPSV7N) [**3ml Pen Cartridges for Peptide Pen and V1 - V2 Pens 10 Packs 3cc Glass Cartridges Individually Sterilized Wrapped**Nonlbzu**$15.95**23 rev1mo ago](https://www.amazon.com/dp/B0GYYW11N1) [**10 Pack 3ml Cartridges for V1 & V2 3cc Empty Glass Cartridge with 11mm Long Stopper Individually Wrapped Leak-Proof Airtight Design.**KNOCKO**$7.71**7 rev2mo ago](https://www.amazon.com/dp/B0H15WNBX8) [**3ml Pen Cartridges for V1-V2 Pens-3cc Cartridges for Peptide Sterilized & Individually Wrapped 10 Pack**Bourvool**$15.93**30 rev2mo ago](https://www.amazon.com/dp/B0GWKX871H) [**3ml Pen Cartridges for V1-V2 Pens-3cc Cartridges for Peptide Sterilized & Individually Wrapped 20 Pack**Bourvool**$26.84**30 rev2mo ago](https://www.amazon.com/dp/B0GWLB2MNZ)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**3ml Pen Cartridges 3cc Cartridges Compatible with V1 & V2 Pens Individually Wrapped (10 Pack)**SUNMON**$13.99**4.4★**▲ 94%**](https://www.amazon.com/dp/B0GTQWGNM4) [**3ml Pen Cartridges for Peptide Pen and V1 - V2 Pens 10 Packs 3cc Glass Cartridges Individually Sterilized Wrapped**Nonlbzu**$15.95**4.8★**▲ 93%**](https://www.amazon.com/dp/B0GYYW11N1) [**ZORLIX 3ml Peptide Pen Cartridge 3ml Pen Cartridge compatible with V1 & V2 Pens Individually Wrapped 60 Pack**Zorlix**$34.85**4.1★**▲ 93%**](https://www.amazon.com/dp/B0GX1TCZ78) [**3ml Pen Cartridges for V1-V2 Pens-3cc Cartridges for Peptide Sterilized & Individually Wrapped 20 Pack**Bourvool**$26.84**4.7★**▲ 92%**](https://www.amazon.com/dp/B0GWLB2MNZ) [**10 Pack 3ml Pen Cartridge with 11mm Long Stopper 3cc Empty Cartridges for Peptide V1-V2 Pens Steam Sterilized & Individually Wrapped**Svforlan**$16.12**4.9★**▲ 92%**](https://www.amazon.com/dp/B0GX6SNJ5B)
**~~View all trending →~~**
## **What buyers say about 3ml cartridge for insulin pen**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**16%
*“Good Quality”*
**Size-Overall**13%
*“Fits Great”*
**Value For Money**11%
*“Great value”*
**Ease Of Use**10%
*“Easy to use”*
**Leak-Proof**9%
*“leak proof”*
**Advertised Vs Actual Product**7%
*“as advertised”*
**Compatibility-Overall**6%
*“works smoothly with compatible pen devices”*
**Strength**4%
*“sturdy”*
**Durability**4%
*“The cartridges feel durable and high quality”*
**Dispensing Mechanism**2%
*“very effective at dispensing”*
### **What buyers complain about **
**Contamination**17%
*“If you are tired of worrying about contamination when transferring your peptides”*
**Leak-Proof**14%
*“Some say the rubber piston leaks if inserted backwards”*
**Ease Of Use**3%
*“lending to a not so great ease of use”*
**Quality-Overall**3%
*“* The lack of QC”*
**Value For Money**3%
*“they are a complete waste of money”*
**Color**3%
*“The indicator was blue not black”*
**Size-Overall**2%
*“They don't fit”*
**Design-Overall**2%
*“They have design defects”*
**Natural Resource Wastage**2%
*“Total waste”*
**Thickness**2%
*“The glass feels thicker”*
### **Top return reasons **
**Size-Overall**26%
**Advertised Vs Actual Product**17%
**Compatibility-Overall**15%
**Functionality-Overall**11%
**Leak-Proof**8%
**Value For Money**5%
**Ease Of Use**3%
**Contamination**2%
**Quality-Overall**2%
**Product Condition**2%
## **Common questions**
- **Is 3ml cartridge for insulin pen profitable to sell on Amazon United States?**
- The niche generates $75K/yr across 27 tracked products. 15 of 26 products launched in the last 360 days are still selling. 90-day search growth is +71.9%. Flapen's verdict: Worth a look (67/100).
- **How competitive is the 3ml cartridge for insulin pen niche?**
- 15 brands and 18 sellers compete. The top 5 products take 47% of clicks and top 5 brands hold 64% of demand.
- **What do buyers complain about in 3ml cartridge for insulin pen?**
- Top complaints mined from reviews: Contamination, Leak-Proof, Ease Of Use. The return rate is 0.4%.
- **What does it cost to enter the 3ml cartridge for insulin pen niche?**
- Listings span $7.71–$50.27; the average listing price is $20.82 (sweet spot $15–$100). The average incumbent carries 50 reviews — the moat a new listing must climb.
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