I can't remember the size now, but I used wire like that 16 years ago. It was orange in colour, and I'ml thinking it was Husqvarna branded.
I used a RedMax trimmer and the wire melted together on the spool which was a pain. Im not sure if that was due to the wire or the Trimmer running unusually hot, but other wire didn't produce this issue.
AR Giulietta 2.0 JTDM-2 -- Total Quartz 9000 Energy 0w30
Hankook Ventus Prime 2 215/50R17 (front)
Pirelli P7 Cinturato 225/45R17 (rear)