Manufacturer of Plastic Air and Fluid Handling Assemblies, Tubing, Hoses, and Profile Extrusions DLH Industries, Inc provides Engineered Solutions through advanced manufacturing techniques including but not limited to Assembly, Plastic Thermoforming, Injection Molding, Tube and Profile Extrusion. We specialize in, but are not limited to, Air and Fluid Handling components and assemblies as well as precision molded and extruded plastic parts. We are vertically integrated to provide one-stop shopping from tool design to finished assembly.