Below are features of each material, with a spec sheet for all following this article:Carbon-reinforced nylon – offers higher strength-to-weight than 6061 aluminum, and is up to 27 times stiffer and 24 times stronger than ABS.Kevlar-reinforced nylon – has the best abrasion resistance and is the most flexible fiber-reinforced nylon material. This material is recommended when you need parts that are durable and resistant to impact.Fiberglass-reinforced nylon – cost effective, and as strong as carbon fiber, this material is 60% less stiff, and two times heavier. 3D hubs recommends it for everyday applications where you need strong parts.3D Hubs states that the materials are ‘less suitable’ for small, detailed parts, but great for making functional prototypes, custom end-use production parts, and structural parts.Brake Lever 3D printed using carbon-reinforced nylon