The 1508 Series from Insulated Wire is a RF Cable with Frequency Range 0.5 to 40 GHz, Cut off Frequency 42 GHz, Propagation Velocity 0.8, Cable Diameter 0.201 Inches, Attenuation 0.09 to 0.85 dB/ft.. Tags: Flexible. More details for 1508 Series can be seen below.