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51

crush washer

Worth a look

Shows low returns (1.5%), but a concentrated shelf (top 5 take 70% of clicks) keeps it on the watch list.

Market size 31Growth 51Conversion 78Competition 26Returns 86Price range 75Avg price 59Brand share 53Review moat 58Quality gap 32

Returns

Great1.5%

return rate — above 6% kills the launch gate

Conversion

Great7.7%

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

Price range

Great$4.81–$44.82

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

Avg price

Good$13.02

avg listing price — sweet spot $15–$100

Review moat

Good1,171.89

avg incumbent reviews — the moat a new listing must climb

Brand share

Good73%

top-5 brand share — brands hold most of the demand

Growth

Good+21.8%

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

Quality gap

Okay4.6★

avg incumbent rating — lower means beatable quality

Market size

Okay$142K

$142K/yr · 142K searches

Competition

Okay70%

top-5 click share — leaders hold, buyers still browse

Competition

The top 5 products take 70% of clicks — established leaders, but buyers still shop beyond them.

Brands

14 falling

Sellers

17

Top-5 brand share

73%

Open market

22%

  • maierke26%
  • AKOSN25%
  • Seamaka9%
  • Magicave8%
  • AUTOMAJOR5%
  • JMINRUN5%

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%$14K20%$28K30%$43K40%$57K101001K10K Reviews — right = deep review moat Market share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 18 tracked products in this niche — three views at once, no toggling.

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +21.8% search growth over the last 90 days.
4K3KSpike '26SepDecMarJunAugNovMarMay

Peak months: May · busiest ÷ quietest = 1.8×

Reviews

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

What buyers love

Quality-Overall24%

“Great product, exactly as described”

Size-Overall20%

“Exact fit”

Value For Money16%

“Cant beat the price”

Advertised Vs Actual Product10%

“As Advertised”

Leak-Proof7%

“do not leak”

Ease Of Use4%

“Comes in handy”

Lubrication2%

“Good to have if you do your own oil changes”

Thickness2%

“Awesome assortment, thick washers”

Ease Of Cleaning1%

“Decent washers”

Efficiency1%

“Works as it should”

What buyers complain about

Size-Overall29%

“Too small”

Thickness16%

“To thin for my needs”

Advertised Vs Actual Product7%

“Inaccurate description”

Quality-Overall6%

“Kindof thin, not great quality”

Compatibility-Overall6%

“Didnt fit my 2005 Subaru Baja”

Leak-Proof5%

“oil may leak from the plug”

Value For Money4%

“Expensive for zero results”

Metal Quality1%

“it's not a big deal that they are aluminum”

Flatness1%

“Hard to determine a flat or rounded side”

Measurement/Reading Accuracy1%

“now I'm doubting I know the correct sizes”

Top return reasons

Size-Overall58%
Advertised Vs Actual Product7%
Compatibility-Overall7%
Thickness5%
Thin4%
Defective Material/Parts4%
Quality-Overall3%
Value For Money3%
Functionality-Overall2%
Leak-Proof2%