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Vacuum Caps

Fail

The top 5 brands take 98% of clicks, so Vacuum Caps is a Fail.

Flapen Score
45
45 / 100
Ranks 4,788 of 7,287 Automotive niches · −4 vs the category median of 49
Market size
$156K/yr102K searches / yr
90-day growth
+20.0%search demand this quarter
Competition
72%top-5 click share · 6 brands · 23 sellers

Flapen Score

Vacuum Caps against its category

The dotted line is the Automotive average. Past it, Vacuum Caps is stronger. Inside it, weaker.

45Fail
Big MarketTrendingHigh ConversionOpen MarketLow ReturnsPrice rangeAvg priceNo Dominant BrandLow Review BarrierQuality Gap
This niche Category average

Market

The Vacuum Caps market on Amazon at a glance

Shoppers on Amazon United States searched for Vacuum Caps 102K times last year and spent an estimated $156K. The top 5 brands take 98% of clicks. Flapen scores it 45 out of 100, a Fail.

01 · Demand

An estimated 13.2% of those searches ended in a purchase.

Shoppers searched for this 102K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 13.2% of those searches ended in a purchase. Searches in the last 90 days moved +20.0% against the 90 days before. Searches, conversion and average price together put the market at an estimated $156K a year.

Searches, last 12 months
102K
Growth, 90 days vs prior 90
+20.0%
Conversion, latest week
13.2%
Market size, estimated
$156Ka year
Peak month
May1.7× the quietest month
Top search term
vacuum caps29K searches a year

02 · Price

A sale here is worth $11.58.

Listings sell for $11.58 on average, from $6.50 to $19.79. Amazon reports units sold in ranges. This niche sold 13K to 15K a year. The average listing sells 750 to 1,000 of them. At $11.58 that is $9K to $12K a year per listing.

Average price
$11.58under the $15 to $100 sweet spot
Price range
$6.50–$19.79
Amazon United States median price
$24.38across 115,062 niches
Units sold a year
13K–15K
Units per listing a year
750–1,000
Revenue per listing a year
$9K–$12K
Returns
1.1%of orders · Amazon United States median 2.1%

03 · Entry bar

The bar here is low.

87% of listings pay for placement with sponsored ads. 100% ship with Prime. On an average day, 0.0% of listings are out of stock. The average listing ranks #17 within Fuel System. It carries 603 reviews at 4.69 stars, so a new listing needs social proof before a better product.

Sponsored listings
87%
Prime listings
100%
Out of stock, average day
0.0%
Average rank
#17in Fuel System
Average rating
4.69 starsAmazon United States average 4.42 stars
Average reviews
603per listing
Listings tracked
15

04 · Newcomers

Brands here are settling in.

The brands on the shelf have sold for 46 months on average, so the names here are settling in.

Launched, last 12 months
0
Successful launches
0Amazon's first-year sales bar
Average brand age
46 months

Products

Top Vacuum Caps products & what they sell for

Every tracked product: its share of the shelf, its reviews, and its price.

Sign in to see the products

The products selling in this niche are for signed-in readers. Every market figure above stays open to everyone.

Competition

Competition: brands, sellers & click share

The top 5 products take 72% of clicks. A locked shelf that new listings rarely crack.

Brands

6 flat

Sellers

23

Top-5 brand share

98%

Top 20: 100%

Top-5 click share

72%

Top 20: 100%

Open market

0%

  • Brand 159%
  • Brand 229%
  • Brand 34%
  • Brand 44%
  • Brand 52%
  • Brand 62%
  • Open — no brand owns it (0%)

Demand

Vacuum Caps search demand

Weekly searches over the year, seasonality beneath. Pick a range.

3K2KSpike '25Spike '26SepDecMarJunAugNovMarMay

No pronounced peak months · busiest ÷ quietest = 1.7×

Search terms

Top Vacuum Caps search terms shoppers use

The exact words shoppers type, with yearly volume, growth, and conversion.

  • vacuum caps29K/yr
  • vacuum line caps11K/yr
  • vacuum caps automotive14K/yr
  • rubber vacuum caps7K/yr
  • vacuum cap assortment7K/yr
  • vacuum plugs automotive7K/yr
  • vacuum plugs5K/yr
  • vacuum cap5K/yr
  • vacuum line plugs5K/yr
  • carburetor vacuum caps4K/yr

Reviews and returns

What reviews say buyers love and hate about Vacuum Caps

We read the reviews and the return reasons for every product selling here.

31%of positive reviews mention “Quality-Overall”
43%of negative reviews mention “Durability”
1.1%of orders come back
“They are literally falling apart”
A buyer, on “Durability”43% of negative reviews mention the same topic

Every topic

Every topic buyers talk about, one row each.

Red shows the share of negative reviews and green the share of positive reviews, biggest topic first. Open a row to read what they wrote.

19 topics

NegativePositive

FAQ

Common Vacuum Caps questions

Answered from the same tracked data.