Key Specifications. Generic Name 020 Semi-rigid Flex Type Semi-Rigid Impedance 50 Ohm Dielectric Type PTFE No. of Shields 1 Attenuation at 1 Ghz. 85 dB Power, Max at 1 Ghz. 2.9 Watts Frequency, Max 27 GHz Max Operating Temperature 85 deg C Center Conductor Type Solid Inner Conductor, Number of Strands 1 Minimum Bend Radius, Repeated 0.05 in Coax Type Coax. Semirigid Coax Cable 0.020 Diameter With Copper Outer Conductor. PE-020SR-BULK part number from Pasternack is a 020 Semi-rigid coax cable that is semi-rigid. Pasternack PE-020SR semi-rigid coax cable is 50 Ohm and has a PTFE dielectric. PE-020SR coax has a shield count of 1 and the maximum frequency for this Pasternack cable is 27 GHz. PE-020SR coax cable has an attenuation at 1 GHz of 85 dB and a maximum power of 2.9 watts at 1 GHz. Pasternack 020 Semi-rigid coax cables are part of over 40,000 RF, microwave and millimeter wave components. PE-020SR cables and our other RF parts are available for same day shipping worldwide. Custom RF cable assemblies using PE-020SR or other coax can be built and shipped same day as well.