This wire is very flexible and the insulation is thick. Description 1050 strands, 0.08 thick - I measured a strand that was 0.08 thick but didn't count all 1050 strands, but it looks correct. The wire takes solder very well and the insulation does not melt at 400 degrees. C. Be careful when separating the red and black wires, I think they separate too easily and the tiny wires break when stripped. Other than that, I'm happy with this purchase.