About this item Low Loss Low Vswr - 50 Ohm Coaxial Lightning Arrester UHF Type Female to Female, Low RF insertion loss less than 0.4dB. VSWR less than 1.2. Reliable Frequency-Band Performance from DC~500MHz. High Quality Construction - The UHF lightning surge protector features quality construction: Body: brass nickel plated; Inner conductor: brass; Insulator: Teflon (PTFE); Coating: nickel electroplating. With Bulkhead - This SO-239 lightning arrester with UHF-female connectors on both sides has enough thread depth and an integrated nut for bulkhead mounting through a wide copper strip and can be effectively used in outdoor enclosures or boxes as a feedthrough for your coax. Protection - Requires additional ground cable. Protect your equipment from dangerous lightning strikes or electrical surges by installing the lightning arrester between the amplifier and the outdoor antenna. Application - A great UHF lightning protection solution for Ham radio, CB Radio, 2-Way Base Stations, and o