M22759/20 wires have extruded PTFE insulation and a high-strength copper alloy conductor for greater break strength.They are ideal for aerospace and other applications requiring high reliability and break strength, enhanced flex life, and resistance to high temperatures. These wires are especially well-suited in applications where smoke emission, overload stability, and flammability are major concerns. For versions of these wires with thinner-wall insulation and 600V voltage rating, see M22759/22 and /23