Hercules II high working pressure multipurpose air and water hose from HBD/Thermoid offers 500 pounds of working pressure at a 4-to-1 safety factor. It has excellent abrasion and oil resistance, and is highly flexible and easy to handle. It offers concentricity of the I.D. and O.D. for ease of assembly and better fitting retention. It is non-conductive and MSHA approved, and available in a wide range of sizes up to 2-inch I.D. 800/543-8070; www.hbdthermoid.com.