This is 25 feet of vintage silver plated copper wire with PTFE teflon(R) insulation. This is 22 AWG stranded wire with 7 strands. This is very high quality wire made in the USA. The color is black. The O.D. of this wire is aprox. 0.0495 inch (1.26mm). This would be great for audio projects, ext. I Will ship Worldwide. Please check my store for more silver plated wire with PTFE teflon(R) insulation. This is a 25 foot length of wire. If you buy more than one I will ship as a continuous length.