This 2-mil stainless steel emitter wire is the best we've found to reduce lossy corona and provide maximum thrust and lift for a good antigravity craft. Very strong for its diameter. We don't recommend using other types of wire, such as thin copper filament, as they just don't have the electrical or weight characteristics to work optimally.
Ten feet of this Ion Emitter Wire For AntiGravity Lifters is enough to build 2 or 3 small crafts. Also available in a 25 foot spool (WIRE2MIL25) for large craft designs.