The 1408 Series from Insulated Wire is a RF Cable with Frequency Range 0.5 to 50 GHz, Cut off Frequency 50 GHz, Propagation Velocity 0.8, Cable Diameter 0.186 Inches, Attenuation 0.10 to 1.12 dB/ft.. Tags: Flexible. More details for 1408 Series can be seen below.