1)cable connectors 2)material: brass 3)with high quality 4)competitive price 5))good after service Electrical Performance1, Frequency ... , Impedance 50 Ohms3, Voltage Rating 500V r.m.s at sea level4, V.S.W.R Straight 1.22@3GHz Max. Right ... .6, Insulation Resistance 5000 M Ohms7, Dielectric Withstanding Voltage 1500V r.m.s, at sea level.8, Insertion Loss 0.20dB ...