RG-178 is a miniature, high-temperature 50-Ohm coaxial cable featuring a highly durable solid PTFE dielectric and a protective outer FEP jacket. Measuring just 1.80 mm in diameter, its silver-plated copper-clad steel core and braided shielding deliver excellent signal clarity up to 3 GHz. It is widely used for space-constrained, high-frequency applications like internal wireless routing, medical instrumentation, and aerospace avionics.