Search  for anything...

2pcs 4x20mm Length 420mm Flat Carbon Fiber Bars,Pultruded Carbon Fiber Strips

  • Based on 64 reviews
Condition: New
Checking for the best price...
$18.95 Why this price?
4th of July Sale · 47% off was $35.99

Buy Now, Pay Later


As low as $4 / mo
  • – 4-month term
  • – No impact on credit to apply
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Apple Pay, and PayTomorrow. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

FREE 30-day refund/replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.


Availability: In Stock.
Fulfilled by Amazon

Arrives Saturday, Jul 4
Order within 11 hours and 34 minutes
Available payment plans shown during checkout

Protection Plan Protect Your Purchase
Checking for protection plans...

Size: 4.0x20x420mm(2pcs)


Features

  • Material:100% carbon Fiber
  • Width:20mm, Thickness:4.0mm, Length: 420mm
  • High strength,lightweight
  • Package:2 pcs

Material: carbon fiber


Brand: cncarbonfiber


Color: black


Shape: Rectangular


Item Diameter: 4 Millimeters


Item Diameter: 4 Millimeters


Item Thickness: 4 Millimeters


Color: black


Item Shape: Rectangular


Item Form: Rod


Material: carbon fiber


Grade Rating: Industrial


Brand Name: cncarbonfiber


UPC: 702401782287


Number of Items: 2


Model Number: carbonbar4x20


Part Number: carbonbar4x20


Manufacturer: cncarbonfiber


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Jul 4

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Good for guitar neck reinforcement
Size: 2.0x10x420mm(6pcs)
Recommend for guitar neck reinforcement
Reviewed in the United States on June 6, 2026 by Jimbo

  • Great to combine with 3d prints
Size: 0.5x5x420mm(6pcs)
It's so great to be able to need a carbon composite rod and have them in just a few days. They are great to combine with 3d printed parts.
Reviewed in the United States on May 8, 2026 by ProfB

  • Splits
Size: 4.0x20x420mm(2pcs)
Very rigid, but it has a grain almost like wood. I drilled holes in each end an after bolting it diwn, it split. Twill carbon fiber doesnt split
Reviewed in the United States on February 7, 2026 by Terry Jr

  • Excellent toy for naughty behaviour.
Size: 0.5x5x420mm(6pcs)
Excellent toy for naughty behaviour. Use as recommended, of course.
Reviewed in the United States on December 24, 2025 by Mark Owens

  • Great reinforcement for foam RC planes. Great reinforcement for foam RC planes.
Size: 0.5x5x420mm(6pcs)
I fly and occasionally crash foam RC aircraft from Horizon Hobby (E-flite). In the past I reinforced the fuselages with fiberglass tape such as used for drywall. I now attach a carbon fiber bar down each side of the fuselage with Foam-Tac. The aesthetics are better and the planes are still crash resistant. I have (unintentionally) nosedived an upgraded Horizon Hobby Conscendo into the turf and it lived to fly again. ... show more
Reviewed in the United States on October 6, 2024 Reviewed in the United States on October 6, 2024 by Theodore Friedman

  • Carbon fiber rods
Size: 3.0x15x420mm(2pcs)
These are good for acustic neck Renforcement I use 2- rods on each neck one on each side of the rrussrod. I will post a picture as soon as I build the neck
Reviewed in the United States on February 12, 2025 by scott

  • Acceptable tolerances
Size: 0.5x5x420mm(6pcs)
These were purchased for a scratch build RC project. Although the tolerances are acceptable, one of them was twisted ( didn't lay flat), but that shouldn't affect most situations. If you're like me you get a little giddy when you order carbon fiber pieces :-) thank you Amazon!
Reviewed in the United States on August 22, 2024 by Patrick Deegan

  • Product Quality
Size: 1.0x5x420mm(6pcs)
Good and useful Product.
Reviewed in the United States on October 7, 2025 by Ehtisham Sabir

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...