3ml cartridge for insulin pen
Worth a lookShows a thin review moat (50 avg reviews), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Review moat
Incredible49.56avg incumbent reviews — the moat a new listing must climb
Returns
Incredible0.4%return rate — above 5% kills the launch gate
Avg price
Great$20.82avg listing price — sweet spot $15–$100
Conversion
Great9.6%search→purchase rate — share of searches ending in a sale
Price range
Great$7.71–$50.27cheapest 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
Good64%top-5 brand share — brands hold most of the demand
Competition
Good47%top-5 click share — leaders hold, buyers still browse
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Market size
Bad$75K$75K/yr · 37K searches
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
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.Top 3ml cartridge for insulin pen search terms
- 3ml cartridge for peptide pen6K/yr
- 3ml pen cartridge7K/yr
- peptide pen cartridge7K/yr
- insulin pen cartridge9K/yr
- insulin cartridge5K/yr
- 3ml cartridge for insulin pen5K/yr
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.
All 24 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
3ml Pen Cartridge - 3cc Cartridges for Peptide V1-V2 Pens Individually Wrapped 10Pack
Goffing$16.024.8★101 rev
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$13.904.3★32 rev
3 ML Pen Cartridge Individually Sterilized Packaged for V1-V2 Pen Cartridges 50 Pack
LZHNB$50.274.7★49 rev
3ml Pen Peptide Glass Replacement Peptide Pen Cartridges Compatible with V1 & V2 Pens Individually Packaged. (Clear5Pack)
HFEOIEN$9.824.1★30 rev
3ml Pen Cartridge Individually Packaged - 3 ml Glass Peptide Pen Cartridges for V1 & V2 Pens Pack of 10
DOKIBI$15.954.5★66 rev
Newest
by launch date
3mL Cartridge for V1-V2 Pens 10 Pack 3cc Peptide Pen Cartridges with 11mm Smooth Stopper Individually Sterilized Packaged
Ferissvo$16.0522 rev
3ml Pen Cartridges for Peptide Pen and V1 - V2 Pens 10 Packs 3cc Glass Cartridges Individually Sterilized Wrapped
Nonlbzu$15.9523 rev
10 Pack 3ml Cartridges for V1 & V2 3cc Empty Glass Cartridge with 11mm Long Stopper Individually Wrapped Leak-Proof Airtight Design.
KNOCKO$7.717 rev
3ml Pen Cartridges for V1-V2 Pens-3cc Cartridges for Peptide Sterilized & Individually Wrapped 10 Pack
Bourvool$15.9330 rev
3ml Pen Cartridges for V1-V2 Pens-3cc Cartridges for Peptide Sterilized & Individually Wrapped 20 Pack
Bourvool$26.8430 rev
Trending
90-day click momentum
3ml Pen Cartridges 3cc Cartridges Compatible with V1 & V2 Pens Individually Wrapped (10 Pack)
SUNMON$13.994.4★
3ml Pen Cartridges for Peptide Pen and V1 - V2 Pens 10 Packs 3cc Glass Cartridges Individually Sterilized Wrapped
Nonlbzu$15.954.8★
ZORLIX 3ml Peptide Pen Cartridge 3ml Pen Cartridge compatible with V1 & V2 Pens Individually Wrapped 60 Pack
Zorlix$34.854.1★
3ml Pen Cartridges for V1-V2 Pens-3cc Cartridges for Peptide Sterilized & Individually Wrapped 20 Pack
Bourvool$26.844.7★
10 Pack 3ml Pen Cartridge with 11mm Long Stopper 3cc Empty Cartridges for Peptide V1-V2 Pens Steam Sterilized & Individually Wrapped
Svforlan$16.124.9★
What buyers say about 3ml cartridge for insulin pen
What buyers praise and complain about, mined from review topics.What buyers love
“Good Quality”
“Fits Great”
“Great value”
“Easy to use”
“leak proof”
“as advertised”
“works smoothly with compatible pen devices”
“sturdy”
“The cartridges feel durable and high quality”
“very effective at dispensing”
What buyers complain about
“If you are tired of worrying about contamination when transferring your peptides”
“Some say the rubber piston leaks if inserted backwards”
“lending to a not so great ease of use”
“* The lack of QC”
“they are a complete waste of money”
“The indicator was blue not black”
“They don't fit”
“They have design defects”
“Total waste”
“The glass feels thicker”
Top return reasons
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.