The SHC-250 from ANOISON Electronics LLC is a RF Cable with Frequency Range DC to 20.4 GHz, Cut off Frequency 20.4 GHz, Propagation Velocity 0.81, Cable Diameter 0.295 Inches, Attenuation 1.81 to 16.29 dB/ft. Tags: Flexible, Hand Formable, Semi-rigid. More details for SHC-250 can be seen below.