Bulk air-brake hoses are used to create custom-length air-brake lines on commercial trucks, over-the-road vehicles, and medium duty trucks. Also called air-brake tubing, these flexible hoses connect to rigid lines in the brake system to allow movement and absorb vibration in the brake lines. They can be cut to the desired length, and compatible hose fittings can be added to the ends of the hoses to create custom hose assemblies.