Low loss Teflon disc type insulators (not pin or rod type supports) are used for long term reliability and service. Rigid coax transmission line also utilizes a unique magneform process for insulator support undercuts. With magneforming, undercuts are magnetically formed rather than rolled or welded, allowing the use of a continuous inner conductor with excellent mechanical and electrical characteristics. Factory installed flanges and joints are Tungsten Inert Gas welded to ensure structural integrity and long life.