Product Description1) Construction Center Conductor: 2.77+0.01mm Solid Copper/Copper Clad Aluminum Dielectric: 11.5+0.05mmFoam PE Outer Conductor: 0.35 thickness Aluminum Tube (welded) Jacket: 14.9+0.05mm PE2) Characteristics Impedance: 75+3 Ohm Capacitance: 50+3nF/km, 15.3+1pF/ft Velocity of Propagation: 87%Attenuation[@68°F.(20°C)]Frequency(MHz)Maximum(dB/100m)50.7501.92003.95006.78008.210009.5