The rg178 from pro power is a rg178 coaxial cable. Silver plated copper clad steel inner conductor ptfe dielectric silver plated copper braid shield (95% coverage) 1.8mm diameter fep jacket impedance of 50 ohm conductor dcr of 800.5ohmkm maximum operating frequency of 3000mhz maximum operating voltage of 1000vrms operating temperature range from -55°c to 200°c reel length of 100m