Truelok® Double Ferrule Tube Fittings, also known as compression tube fittings. Compression tube fittings are used in gas delivery systems, instrumentation, and other process control equipment. Compression tube fittings are manufactured in SS 316 Material. These tube fittings are extensively used in a variety of industrial applications, especially in Oil & Gas, Petroleum Refining, Power Generation, Chemical Processing, Semiconductor Manufacturing, Pulp & Paper, Research, and Bio-Technology. Pharmaceutical, Aerospace, and many other industries. Truelok® Tube Fittings are designed and manufactured under a stringent Quality Assurance & Process Control System. These fittings provide cost-effective, reliable, and leakproof connections in Instrumentation and Process Control Sample Systems.