Fiber-Reinforced Nylon prints metal strength parts for the price of plastic. Parts have a higher strength-to-weight ratio than 6061-T6 Aluminum, up to 27x stiffer and 24x stronger than ABS. Typical applications include engineering parts, like jigs, fixtures and tooling. The material is less suitable for small intricate parts.
You can find general design rules for designing for fiber-reinforced Nylon here.
Upon launch, 3D Hubs has 17 certified providers based across Europe, the US, and South America shipping Fiber-Reinforced Nylon prints across the world. The service provider uses Markforged printers for this material group.