Superbat Black RG58 RF Coaxial Cable Connector Adapter RG58 / 50 feet Coax Cable 50ohm. PHYSICAL PROPERTIES: Material - Bare Copper, Solid PE, Tinned Copper Bried, PVC. Diameter - 19*0.18, 2.95, 3.50, 4.95. ELECTRICAL PROPERTIES: Nom. Capacitance Conductor to Shield - 101.05, Nom. Characteristic Impedance - 50, Nom. Velocity of Propagation - 66, Min. Bend Radius Install - 25, Voltage Rating - 1400, Max. Operating Frequency - 1000, Operating Temperature Rating - negative 25 to positive 70.