This is an assortment of silver plated copper wire with PTFE (Teflon) insulation. This assortment is all 28 AWG stranded wire with 7 strands. There is 5 lengths of wire. Each length is 10 feet making the total 50 feet. Each length is a different color so you will receive 5 different colors. The OD of this wire is aprox. 0.0325 inch (0.83mm). The colors that you receive may be different than the ones in the photo. This is very high quality mil. Spec. wire. This would be great for audio projects, ext. I Will ship Worldwide.