Maxline is an industrial compressed air piping system that is:Fast and easy to install,Cost effective,Leakproof,Corrosion resistant.Maxline's multilayer construction can be easily bent by hand and maintain its desired shape, giving a professional appearance with no tubing sag. 100 ft rolls allow for faster installation times, with fewer joints.Its smooth interior walls will never build up scale or rust making it an efficient air system. Maxline piping can be mounted on wall surfaces, in wall for new construction and be directly buried under ground or concrete. This system is easily configured and can be re-modified. Maxline fittings are nickel plated brass designed for years of long term performance. Its double o-ring compression design is engineered to be a leakproof system, that can be easily disassembled and reused.Includes:3/4 Tubing 100 ft.(3) Air Outlets. (2) Tees. 3/4 MNPT Straight.(20) Mount Clips.ToolsOperating pressure: 175 psi at 70 degrees F, 140 psi at 140 degrees F.