We carry DOT Tubing developed for brake system connections that maintain a basically fixed relationship between couplings during vehicle operation. Our tubing is made from nylon and is available in more than ten colors for quick identification of lines. Our Air Brake tubing is produced in a Type A (Single-wall extruded Nylon) and a Type B (Nylon core, Fiber reinforcement, Nylon jacket) tubing. Both Type A and Type B meet specifications SA J844 and DOT FMVSS 49CFR 571.106. In addition, these products are 100 percent pressure tested and operate up to 200°F.