extension block
Worth a lookShows low returns (1.4%), but strong incumbent ratings (4.7★) keeps it on the watch list.
Returns
Great1.4%return rate — above 5% kills the launch gate
Conversion
Great8.9%search→purchase rate — share of searches ending in a sale
Competition
Great33%top-5 click share — an open shelf
Avg price
Great$17.28avg listing price — sweet spot $15–$100
Price range
Great$9.27–$37.90cheapest to priciest tracked listing — scored on the share inside $15–$100
Brand share
Good62%top-5 brand share — brands hold most of the demand
Market size
Okay$139K$139K/yr · 90K searches
Growth
Bad-0.1%90-day search growth — must beat 0% to launch
Review moat
Bad14,602.4avg incumbent reviews — the moat a new listing must climb
Quality gap
Bad4.7★avg incumbent rating — lower means beatable quality
According to Flapen's Amazon United States niche tracking, extension block is a $139K/yr Amazon United States market (90K searches/yr). The top 5 brands hold 62% of demand. Demand peaks in Jan. Verdict: Worth a look — 55/100.
Data updated Jul 17, 2026 · scored weekly · How we score niches
extension block market data
- Units sold / yr
- 8K–10K
- avg 100–250/product
- Revenue / yr
- $138K–$173K
- units × avg price
- Conversion rate
- 8.9%
- Avg BSR
- #92
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 75%
- Out of stock
- 0.0%
- Avg brand age
- 46 months
- Avg seller age
- 182 days
Competition & brand share
Clicks spread well past the top 5 (33% combined) — an open shelf where new products get seen.Brands
27 rising
Sellers
81
Top-5 brand share
62%
Top 20: 95%
Top-5 click share
33%
Top 20: 71%
Open market
32%
- Anker19%
- Addtam15%
- Amazon Basics13%
- TESSAN8%
- Belkin7%
- YISHU7%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -0.1% search growth over the last 90 days.Peak months: Jan · busiest ÷ quietest = 1.9×
Top extension block search terms
- white surge protector power strip26K/yr
- power strip white22K/yr
- white surge protector20K/yr
- angled power strip6K/yr
- right angle surge protector5K/yr
- white powerstrips with surge protector3K/yr
- narrow power strip4K/yr
- sideways power strip3K/yr
Top extension block 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
Flat Plug Power Strip Ultra Thin Flat Extension Cord - Addtam 12 Outlet 3 Sides Multiple Outlets 5Ft 1050J Surge Protector Wall Mount Desk Charging Station for Home Office Dorm Room Essentials
Addtam$10.194.8★4,221 rev
6 Ft Surge Protector Power Strip - 8 Widely Outlets with 4 USB Ports 3 Side Outlet Extender with 6 Feet Extension Cord Flat Plug Wall Mount Desk USB Charging Station ETL White
YISHU$9.414.6★51,188 rev
Anker Power Strip with 2100J Surge Protector Outlet Extender 5ft Extension Cord with Multiple Outlets 12 AC 2 USB A 1 USB C Port for 20W Home Office Dorm Room Essentials TUV Listed
Anker$27.054.8★19,415 rev
Anker Power Strip with 300J Surge Protector Flat Plug Extension Cord with Multiple Outlets 6 AC 2 USB A & 2 USB C Ports for 20W 5ft Outlet Extender Dorm Room Essentials Home Office
Anker$23.084.7★4,532 rev
Amazon Basics Rectangle 6-Outlet Surge Protector Power Strip with Circuit Breaker 600 Joule 2ft Cord White 2-Pack
Amazon Basics$11.294.7★44,273 rev
Newest
by launch date
10Ft Extension Cord with Multiple Outlets SUPERDANNY Flat Plug Surge Protector Power Strip 10 Ft Long Cord 6 Outlets & 3 USB Ports Charging Station for Home Office College Dorm Room Essentials
SUPERDANNY$12.658,298 rev
TROND Surge Protector Power Strip with 360 Rotating Flat Plug 5 Widely Spaced Outlets with 2 USB C and 2 USB A 1440J Surge Protector Wall Mountable Extension Cord 6ft for Home Office Dorm White
TROND$21.402,086 rev
Amazon Basics Rectangle 6-Outlet Surge Protector Power Strip with Circuit Breaker 600 Joule 2ft Cord White 2-Pack
Amazon Basics$11.2944,273 rev
Amazon Basics 12-Outlet Surge Protector Power Strip 4000 Joules 8ft Extension Cord Rectangle for Home Office Gaming Room White
Amazon Basics$17.95490 rev
Anker Power Strip 900J Surge Protector 35W Max
Anker$26.481,319 rev
Trending
90-day click momentum
GE Surge Protector Power Strip 6 Ft Extension Cord 6 Outlet Extender 800 Joules Flat Plug Twist-to-Close Safety Covers ETL Listed White 67051
GE$13.484.8★
10Ft Extension Cord with Multiple Outlets SUPERDANNY Flat Plug Surge Protector Power Strip 10 Ft Long Cord 6 Outlets & 3 USB Ports Charging Station for Home Office College Dorm Room Essentials
SUPERDANNY$12.654.7★
TROND Surge Protector Power Strip with 360 Rotating Flat Plug 5 Widely Spaced Outlets with 2 USB C and 2 USB A 1440J Surge Protector Wall Mountable Extension Cord 6ft for Home Office Dorm White
TROND$21.404.7★
Amazon Basics Power Strip Surge Protector with 6 Outlets 2 USB Ports 1000 Joule Protection 6-Foot Extension Cord White
Amazon Basics$11.154.8★
Amazon Basics 12-Outlet Surge Protector Power Strip 4000 Joules 8ft Extension Cord Rectangle for Home Office Gaming Room White
Amazon Basics$17.954.8★
What buyers say about extension block
What buyers praise and complain about, mined from review topics.What buyers love
“Build quality is great”
“All the ports work great”
“Just as pictured”
“Excellent value”
“Great charger”
“Very handy”
“Compact design”
“Fit perfectly”
“Surge Protector”
“Solid product”
What buyers complain about
“Didnt last”
“USB Ports Don't Work”
“Makes noise”
“Did not work”
“Cheap quality”
“Does not charge”
“Large size”
“false advertisement”
“A little pricey”
“Immediately caused overheating”
Top return reasons
Common questions
- Is extension block profitable to sell on Amazon United States?
- The niche generates $139K/yr across 52 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is -0.1%. Flapen's verdict: Worth a look (55/100).
- How competitive is the extension block niche?
- 27 brands and 81 sellers compete. The top 5 products take 33% of clicks and top 5 brands hold 62% of demand.
- What do buyers complain about in extension block?
- Top complaints mined from reviews: Durability, Socket/Port/Plug, Noise Level. The return rate is 1.4%.
- When does demand for extension block peak?
- Demand peaks in Jan; the busiest month runs 1.9× the quietest.
- What does it cost to enter the extension block niche?
- Listings span $9.27–$37.90; the average listing price is $17.28 (sweet spot $15–$100). The average incumbent carries 14,602 reviews — the moat a new listing must climb.