I te nuinga o te wa i roto i te rahi o te flange putanga, te rahi o te waahanga whiti ranei ka kiia, 40/42, 50/60, 70/80, 90, 115/120, 142, 160, 180, 220, 240, etc.
Ko te roopu HOPRIO he kaihanga ngaio o te kaiwhakahaere me nga motuka, i whakapumautia i te 2000. Te tari matua o te roopu i Changzhou City, Jiangsu Province.