Premier Farnell
cable, sec, coax, 5.89mm, 152.4m; length, reel (imperial):500ft; length, reel (metric):152.4m; wire size, awg:20awg; conductor area csa:0.519mm²; cores, no. of:1; outer insulation colour:black; material, outer insulation:pvc; conductor make-up:1.0.80mm; material, conductor:copper; external diameter:5.89mm; voltage, rating:300v; attenuation @ 100mhz:2.60db; attenuation @ 10mhz:0.90db; attenuation @ 1ghz:8.50db; attenuation @ 1mhz:0.30db; attenuation @ 200mhz:3.60db; attenuation @ 400mhz:5.00db; attenuation @ 50mhz:1.90db; core-screen capacitance:16.3pf/ft; impedance:75ohm; material, primary insulation:pe; material, secondary insulation:pvc; primary insulation colour:white; secondary insulation colour:black; standard:pvc; temp, op. max:75°c; temp, op. min:-30°c; velocity of propagation:83%
http://grh.premierfarnell.com/grh.aspx?mid=1000105&sku=54394... 
