Sma series RF coaxial connector has small volume, wide frequency band, excellent mechanical properties, high reliability and so on. It is one of the most popular used rf coaxial connectors. Electrical characteristics: Characteristic impedance: 50++ Frequency range: For flexible cable: 0-12.4ghz For semi-rigid or semi-flexible cable: 0-18ghz Contact resistance: Inner conductor: fn3.0m++ Out conductor: fn2.0 m++ Insulation resistance: f+5000m++ Vswr: For flexible cable: fn1.15+0.02f For semi-rigid or semi-flexible cable(straight): fn 1.10+0.01f Durability: 500 cycles Material and finishing: Center contact: Pin-------phosphor bronze, gold plated Jack------beryllium bronze, gold plated Body and other metal parts: Brass, nickel or gold plated Insulator: PTFE Gasket: silicone rubber. Standard export packing.