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8pcs 4.0mm Square Carbon Fiber Solid Rods 4.0x4.0x420mm,1.4/2/3/4/6mm Available

Free shipping on orders over $29.99

$16.95

$ 7 .99 $7.99

In Stock

1.Size:1.4x1.4x300mm


About this item

  • Material:100% carbon Fiber
  • Side:4.0mm; Length: 420mm
  • Weight: 9.8g/pcs
  • High strength,low weight
  • Package:8 pcs



Product Description

Professional manufacturer of carbon fiber products

customized carbon fiber

CNcarbonfiber is a professional manufacturer and distributor of carbon fiber products. Founded in 2010, located in Shenzhen,China, we have our own production workshop and CNC machining workshop.

We specializing in carbon fiber sheet and cnc precised machining, carbon fiber round tubes/square tubes, aluminum alloy processing and customized carbon fiber parts.

Customer Reviews
4.5 out of 5 stars 50
4.5 out of 5 stars 83
4.4 out of 5 stars 25
4.6 out of 5 stars 48
4.9 out of 5 stars 38
4.8 out of 5 stars 24
no data no data no data no data no data no data

Nigelgiesbrecht
2025-08-11 12:51:27
Super strong..never had a problem with them...have bought multiple times
Kurt Gary
2025-08-09 14:36:30
I bought these for neck reinforcement. I used the first one to stiffen the neck of an old Marting guitar with a steel tube reinforcement. Fit inside with a little shimming and epoxy .
Troy Cade
2025-08-06 19:01:48
Great for adding strength to weak areas on foam rc airplanes.
Erich Schmidt
2025-07-27 15:16:44
I use these on cigar box guitar necks. Fit perfectly in a ¼” channel. Super strong and light weight. I’ll be buying more of these!
Customer
2025-07-23 13:44:59
Quality is amazing!Solid, conducive and heavy duty!
Brian ONeil
2025-06-22 18:52:38
This is not a solid carbon rod;It catches on fire and fills the room with horrible stinking smoke. (no preperation to usea respirator) it may be toxic.
DirDick
2025-02-22 16:23:44
Hobbyist mandolin builder. I decided to try a carbon rod in place of the adjustable truss rods used in past builds: 1) easier to cut channel and install this square rod; 2) much easier to get an exact fit; 3) neck did not shift or warp under string tension. So, I'll be using these in the future. Bonus was that each rod makes two mandolin necks - easily and accurately cut with a hacksaw. Good product for my needs
Ted Brown
2025-02-08 13:17:17
fair value
C Rf
2025-01-10 12:13:31
Used to stiffen the neck of my guitar build. Dimensions are exactly as described. Good product.
Chachung
2024-11-24 10:54:44
Very good quality. The sized measured is exactly 1.4mm. Couldn't be happier!
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