Premier Farnell
cable, twinax, blue, 8.23mm, 304.8m; reel length (imperial):1000ft; reel length (metric):304.8m; cable type:coaxial; wire size, awg:18awg; conductor area csa:0.891mm²; primary insulation colour:blue, clear; primary insulation material:po; conductor make-up:7 / 26awg; conductor material:tinned copper; external diameter:8.23mm; attenuation @ 100mhz:5.35db; attenuation @ 10mhz:1.98db; attenuation @ 1mhz:0.52db; attenuation @ 200mhz:7.57db; attenuation @ 400mhz:10.7db; attenuation @ 50mhz:3.78db; capacitance:19.5pf/ft; impedance:78ohm; radius, bend min:3.25"; secondary insulation colour:blue; secondary insulation material:pvc; temp, op. max:75°c; temp, op. min:-40°c; velocity of propagation:64.5%; voltage rating, ac:600v
http://grh.premierfarnell.com/grh.aspx?mid=1000105&sku=3072F... 
