Our promise to you includes...

Delivery van

Free next working day delivery to UK mainland on all orders over £100 (ex. VAT) placed via the website before 5pm, subject to stock (simply select "Next Working Day" under "Free Shipping" at checkout).

Established in 1988

We are the 3D printing arm of a larger company called Express Group Ltd. Fixing printers since 1988, today we are a Specialist Parts Distributor and Experts in 3D Printing.

ISO Certified

We take quality control very seriously, which is why we are audited for ISO9001:2015 certification, this helps ensure we provide great customer service.

01765 540 115
Account | Basket | Contact


Markforged makes industry-leading 3D printers for applications in engineering, manufacturing, product design and functional prototyping. Print metal, carbon fibre, high-temp fibreglass, fibreglass, Kevlar and more. Print parts, tools, and fixtures stronger than metal, or even in metal. The possibilities are endless, and the 3D printers are tried, tested and proven in industry. Quality is the Markforged difference. This is a brand you can rely on to deliver consistency every time.

Compare Products

You have no items to compare.

Request A Free Sample - Find Out More
Opt out of 3D printing information and news

* Required

Request a sample

Please fill out the details below and we will get back to you as soon as possible.

Onyx Spool
A clip printed with Nylon and Onyx
A piece of casing printed in Onyx
Battery case made of Onyx
A close up of an Onyx print
A case printed in Onyx

Markforged Onyx Filament 800cm³


Onyx is a breakthrough material for use with the Markforged 3D printers. It is a material designed for printing stiff and strong parts that look good enough to be used for customer-facing assemblies.

Onyx is based on a tough nylon and it gets its strength and appearance from chopped carbon. Chopped carbon is a free-flowing material suitable for high-temperature 3D printing and it also has excellent chemical resistance.

Onyx can be used on its own to create parts with a stiffness equal to or greater than standard thermoplastics, or it can be used alongside Markforged composites, including high-temp fibreglass, fibreglass, carbon fibre and Kevlar. Parts printed with Onyx are strong and durable, however they can be taken to a whole new level with composite reinforcement (for example, parts embedded with carbon fibre CFF have the strength of 6061 aluminium).

In terms of appearance, parts printed with Onyx are a matte jet black. However, the surface is not smooth. Onyx has a unique texture and appearance courtesy of that chopped carbon, which creates hundreds of subtle lines. Depending on your part’s design, these lines can be vertical, horizontal, perpendicular or parallel. The net result is end-use parts and prototypes that look excellent - and of a quality that is suitable for most customer-facing assemblies.

Nylon with micro-carbon reinforcement
Manufacturer SKU

Product Downloads
Here's some downloads we think you might be interested in that relate to this product:
  • £150.00 EX. VAT
  • £180.00 INC. VAT
  • InStock

  • Markforged

    Many 3D printers lay claim to being ‘industrial-grade’ but when you delve into their material list, rarely do you find anything more durable than nylon.

    That’s where Markforged 3D printers differ. In the case of the Desktop and Industrial series 3D printers, these use nylon or Onyx as the base material (Onyx is a proprietary filament made by Markforged, it’s part nylon, part chopped carbon fibre). You can then reinforce prints with continuous strands of a stronger composite - carbon fibre, fibreglass, or Kevlar - to create truly industrial-grade prototypes and end-use parts.

    For example, parts printed in carbon fibre are stronger than 6061-T6 aluminium. The Desktop series includes the Mark Two, Onyx One and Onyx Pro, and the Industrial series the X7, X5, and X3. There’s a printer for every application.

    Then there’s the Metal X, Markforged’s greatest machine yet. This 3D printer utilises a process called ADAM (Atomic Diffusion Additive Manufacturing) to print parts in powdered metal surrounded by a plastic support. The parts are then sintered in a furnace externally to become solid. This enables you to manufacture metal parts with geometries and details that would be impossible with subtractive manufacturing processes.