There are lots of gauges of wire and lots of wicking materials. I use 32 gauge Kanthal (Rob sells it on his site.) I use cotton thread as a wick, but lots of people use cotton, bamboo, silica, SS mesh.....it goes on and on. Rob also sells silica (2 sizes and either will work) on his site. It's pretty much experimentation as far as what to use. There are some pretty good you tube videos about wrapping coils for the rebuildables. Check out a few....this one is similar to either the Chalice or the ERA or the A7 as far as building a coil goes. Hope this helps.