Mubisanzwe, uruziga rufite uburyo bubiri: Imiterere ya EU nuburyo bwa Amerika.Imiterere ya Eu ifite inkoni imwe, ibereye akarere k'Uburayi n'isoko rya Ositaraliya cyane cyane, ibindi bihugu nabyo birabikoresha.Imisusire yo muri Amerika ifite ubwoko bubiri bwakazu, akazu 4 nakazu 5.Irazwi cyane muri Amerika, Kanada no mubindi bice byo muri Amerika ya ruguru, agace ka Amerika yepfo nibindi.
Inkoni ifite uburyo bubiri bwo kuvura, Zinc yashizwemo na Chrome.Chrome isa neza nibyiza, isahani ya Zinc nubukungu.Inkoni ifite diametero ebyiri, 5.7 mm na 7,7 mm.7,7 mm irakomeye, ariko ubunini bwa 5.7 mm burahagije kubikorwa bisanzwe.