20 AWG single strand tin plated copper (TPC) triple insulated wire (TIW) in Dupont Teflon PFA insulation at .0015 per layer. Dupont Teflon PFA is a Fluoropolymer compound with excellent electrical properties, heat resistance, chemical resistance, and abrasion resistance

Used in high temperature power supplies, medical equipment and transformers

This wire is rated for 180C and 1000V with a tensile strength of 3600 psi and a breakdown voltage of 8000V