This is 25 feet of silver plated copper wire with PTFE insulation. This is 20 AWG solid wire with 1 strand. This is very high quality mil. Spec. wire made by Weico. The mil-spec number is M16878/4.  It is rated at 600V 200C. The OD of this wire is aprox. 0.0520 inch (1.32mm). The color is green. This would be great for audio projects, ext. I Will ship Worldwide. This is a 25 foot length of wire. If you buy more than one length I will ship as a continunus length.