Essex Magnet Wire 18 AWG Gauge Enameled Copper Wire - 10 LBS UL recognized class 200 Product (High temperature Class: 200C/392F) Premium quality Essex magnet wire in original factory spool, Conforms to NEMA MW-35C standard Insulation type: modified polyester basecoat and an improved polyamideimide topcoat AWG size: 18 AWG, round. Average Shipping Weight: 10 lbs Insulation type: polyester-polyamide-imide, polyester basecoat, polyamide-imide topcoat.