... 4 #or 6# Weight : 6 kg Usually , we use grommet machine for flex banner , the grommet is 2 parts/set, positive ... ring, and negative ring, then put the flex banner in machine, press handle to finish it. It is too slow, and ... grommets well, then get waster.Now our single ring grommet machine can solven above problems. It only use positive ring, no ...