Natural Gas Services Group, Inc. is a provider of gas compression equipment, technology and services to the energy industry. The Company manufactures, fabricates, rents, sells and maintains natural gas compressors for oil and natural gas production and plant facilities. It manufactures a line of compressor frames, cylinders, and parts, known as its Cylinder-in-Plane (CiP) product line. It uses finished CiP component products in the fabrication of compressor units for sale or rental by the Company or sells the finished component products to other compressor fabricators. It holds a limited inventory of flare stacks and related ignition and control devices for onshore and offshore incineration of gas compounds such as hydrogen sulfide, carbon dioxide, natural gas and liquefied petroleum gases. To provide customer support for its compressor and flare sales businesses, the Company stocks varying levels of replacement parts at its Midland, Texas facility and at field service locations.