The Pasternack LMR-400-UF is a flexible coaxial cable with a 50 Ohm impedance and a PE (F) dielectric. It features a 0.405" TPE jacket and has two layers of shielding, providing 90 dB of RF shielding. The maximum frequency for this Pasternack cable is 5.8 GHz, and its attenuation at 1 GHz is 5 dB.