3/8 hose
Skip itA small market ($89K/yr) — this niche doesn't clear our bar today.
Conversion
Great8.7%search→purchase rate — share of searches ending in a sale
Price range
Great$7.15–$42.87cheapest to priciest tracked listing — scored on the share inside $15–$100
Returns
Great2.0%return rate — above 5% kills the launch gate
Avg price
Good$14.64avg listing price — sweet spot $15–$100
Growth
Good+38.7%90-day search growth — must beat 0% to launch
Brand share
Okay81%top-5 brand share — brands hold most of the demand
Review moat
Okay2,974.95avg incumbent reviews — the moat a new listing must climb
Competition
Okay70%top-5 click share — leaders hold, buyers still browse
Quality gap
Bad4.6★avg incumbent rating — lower means beatable quality
Market size
Bad$89K$89K/yr · 70K searches
According to Flapen's Amazon United States niche tracking, 3/8 hose is a $89K/yr Amazon United States market (70K searches/yr). The top 5 brands hold 81% of demand. Demand peaks in May–Jun. Verdict: Skip it — 48/100.
Data updated Jul 9, 2026 · scored weekly · How we score niches
3/8 hose market data
- Units sold / yr
- 6K–8K
- avg 250–500/product
- Revenue / yr
- $88K–$117K
- units × avg price
- Conversion rate
- 8.7%
- Avg BSR
- #133
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 84%
- Out of stock
- 1.5%
- Avg brand age
- 47 months
- Avg seller age
- 179 days
Competition & brand share
The top 5 products take 70% of clicks — established leaders, but buyers still shop beyond them.Brands
13 rising
Sellers
33
Top-5 brand share
81%
Top 20: 100%
Top-5 click share
70%
Top 20: 100%
Open market
13%
- Eastman22%
- dojobkinb21%
- Eunice14%
- EVIL ENERGY13%
- Eastrans11%
- Storystore6%
- Open — no brand owns it (7 brands, 13%)
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +38.7% search growth over the last 90 days.Peak months: May, Jun · busiest ÷ quietest = 2.0×
Top 3/8 hose search terms
- 3/8 hose48K/yr
- 3/8 rubber hose10K/yr
- 3/8 id hose6K/yr
- 3/8 pcv hose3K/yr
- 3/8 inch hose3K/yr
Top 3/8 hose 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 19 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
3/8 Inch (10mm) ID Fuel Line Hose 10FT NBR Rubber Push Lock Hose High Pressure 300PSI for Automotive Fuel Systems Engines
dojobkinb$10.424.6★5,527 rev
Eastman 3/8 Inch ID (1/2 Inch OD) PVC Clear Vinyl Tubing 10 Foot Length 98620
Eastman$7.744.6★5,392 rev
EVIL ENERGY 3/8 Fuel Hose Line Push Lock NBR Rubber SAE 30R7 10FT 300PSI
EVIL ENERGY$14.894.8★2,325 rev
3/8 Inch (10mm) ID Fuel Line Hose 10 FT 300PSI Push Lock NBR Rubber Hose for Automotive
Eunice$8.414.6★1,837 rev
3/8 Inch ID NBR Rubber Hose 10 Feet Fuel Hose Line Transfer Hose for Small Engine Black
Storystore$9.544.5★413 rev
Newest
by launch date
3/8 Inch (10mm) ID Fuel Line Hose 10FT NBR Rubber Push Lock Tubing High Pressure 300PSI for Automotive Fuel Systems Engines and Gas Transmission Line
TUBPRO$9.8441 rev
ZONBANG 3/8 Fuel Line NBR Rubber 3/8 Fuel Hose Nylon Braided Fuel Line Hose for Automotive Vehicles(5FT)
ZONBANG$7.15324 rev
3/8 Inch (10mm) ID Fuel Line Hose 5 FT 300PSI Push Lock NBR Rubber Hose for Automotive
Eunice$7.621,837 rev
HOUSUN Fuel Line 3/8 Inch ID Fuel Hose 10FT J30R7 Fuel Line Hose NBR with 10 Clamps.
HOUSUN$11.791,790 rev
DERPIPE Soft Braided PVC Tubing - 3/8 x 5/8 OD High Pressure Clear Flexible PVC Tube Reinforced Vinyl Hose for Water Oil with 2pcs Hose Clamps (10Ft)
DERPIPE$14.62652 rev
Trending
90-day click momentum3/8 Inch (10mm) ID Fuel Line Hose 10FT NBR Rubber Push Lock Tubing High Pressure 300PSI for Automotive Fuel Systems Engines and Gas Transmission Line
TUBPRO$9.844.4★
Eastman 3/8 Inch ID (1/2 Inch OD) PVC Clear Vinyl Tubing 20 Foot Length 98566
Eastman$12.214.6★
3/8 Inch (10mm) ID Fuel Line Hose 5 FT 300PSI Push Lock NBR Rubber Hose for Automotive
Eunice$7.624.6★
3/8 ID x 10 Ft High Pressure Braided Clear PVC Vinyl Tubing Flexible Vinyl Tube Heavy Duty Reinforced Hose Tubing BPA Free and Non Toxic
Eastrans$15.004.7★
3/8 ID x 50 Ft High Pressure Braided Clear PVC Vinyl Tubing Flexible Vinyl Tube Heavy Duty Reinforced Hose Tubing BPA Free and Non Toxic
Eastrans$32.024.7★
What buyers say about 3/8 hose
What buyers praise and complain about, mined from review topics.What buyers love
“Quality hose and price is great”
“Worth the money”
“Exactly as advertised”
“Worked to fix my problem”
“It fits snugly”
“Very good gas hose”
“It has a braided layer to handle the pressure without issues”
“more durable”
“Extra heavy tubing”
“Flexible”
What buyers complain about
“And leaked the next day”
“it was 3 short of 10'”
“Poor quality hose”
“It broke down”
“This tubing has a horrible rubber smell”
“Cheap material”
“Everything I had burst was at 55psi aka stock LS fuel rail pressure”
“Don't install this”
“thick feel of the EE hose”
“4 ft shorter than advertised”
Top return reasons
Common questions
- Is 3/8 hose profitable to sell on Amazon United States?
- The niche generates $89K/yr across 19 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is +38.7%. Flapen's verdict: Skip it (48/100).
- How competitive is the 3/8 hose niche?
- 13 brands and 33 sellers compete. The top 5 products take 70% of clicks and top 5 brands hold 81% of demand.
- What do buyers complain about in 3/8 hose?
- Top complaints mined from reviews: Leak-Proof, Size-Overall, Quality-Overall. The return rate is 2.0%.
- When does demand for 3/8 hose peak?
- Demand peaks in May–Jun; the busiest month runs 2.0× the quietest.
- What does it cost to enter the 3/8 hose niche?
- Listings span $7.15–$42.87; the average listing price is $14.64 (sweet spot $15–$100). The average incumbent carries 2,975 reviews — the moat a new listing must climb.