QN1803 kowiri tira no te whanau QN i whakawhanakehia e Qingtuo Group, kei roto ano ko QN1701, QN1804L, QN1906Mo, me QN2109Mo. Hei reanga o muri mai, he hauota hauota austenitic alloy, kua hangaia te QN1803 hei whakawhiti i te aputa i waenga i te mahi me te utu, e tuku ana i tetahi whakakapi kaha mo te 304 kowiri tira.