Gardner Denver Quick-Lock Tubing is a solid metal compressed air piping system that provides superior strength with a lightweight design. The nickel plated brass fittings and powder coated extruded aluminum pipe provides a system that is easy to install, while ensuring high performance and versatility. Manufactured from marine-grade aluminum that prevents rust and system deterioration All metal system Fittings are nickel plated brass Ease of installation High flow rates / low pressure losses Smooth internal diameter of tube maintained throughout life of the system