Foam-Core Low-Loss Coaxial Microwave Cables Temp-Flex Foam-Core Low-Loss Coaxial Microwave Cables combine space-saving features with an effective dielectric. The fluoropolymer insulation eliminates the phase-knee effect and delivers linear electrical length (stable performance) at room temperature. The cables achieve 80% velocity of propagation (VOP) loss characteristics. It also offers shielding greater than 100dB at high frequencies. Applications for the Temp-Flex Foam-Core Loss Loss Microwave Cables include data / telecom / networking, medical, and aerospace, and defense.