The 1603 Series from Insulated Wire is a RF Cable with Frequency Range 0.5 to 32 GHz, Cut off Frequency 34 GHz, Propagation Velocity 0.71, Cable Diameter 0.218 Inches, Attenuation 0.09 to 0.99 dB/ft.. Tags: Flexible. More details for 1603 Series can be seen below.