Hamilworth profesional florist wires.
The only brand i found is the best of the best, quality of the wire is really greate. The tape holds on perfectly and doesn't roll off.
I use wires, for creating all of my Gum Paste and Wafer paper flowers, depending on your application you have to chose the correct gauge. The lighter the flower the thiner the wire should be used.
For more detailed usage of wire , check out my Masterclass tutorials.