Great Tig cups, use for better gas coverage or when you really need to get the tungsten out there.
#12 comes with two complete cups with screens and a spare screen.
#16 comes with one complete cup and screen, with extra screen
#20 comes with one complete cup and screen, with extra screen.
they fit directly to small torches (see video below to determine your torch size) or the can be adapted to large torches with a stubby gas lens sold as a package in the drop-down menu.