The Times Microwave PhaseTrack^®140 is an Ultra-Flexible phase-stable coax assembly featuring a proprietary fluorocarbon dielectric, TF4^®, eliminating the PTFE change phase occurring around 19 ºC. PhaseTrack assemblies have the same triple-shield construction used in our popular SF^®, SFT^®, SilverLine^®, and MilTtech^® cables and are ideal for applications demanding stable phase over temperature.