The RG218/U from Pasternack Enterprises Inc is a RF Cable with Frequency Range DC to 1 GHz, Cut off Frequency 1 GHz, Propagation Velocity 66%, Attenuation 0.65 to 5 dB/100 ft, Capacitance 30.8 pF/ft. Tags: Flexible. More details for RG218/U can be seen below.