Pou U, i tapaina i runga i te wāhanga whakawhiti āhua-U, he momo pou whetū maha-mahi a HEBEI JINSH e whakamahia whānuitia ana i ngā mākete o te USA. Mā ngā kōhao i pokaia te pou anake ka whakarite kia mau te hononga ki te waea taiapa. Nō reira, ka taea te whakamahi hei whakau i te taiapa mata waea, hei whakatika i ngā tipu, tae atu ki te whakau i ngā tohu huarahi, me ētahi atu.
E rua ngā momo o ngā pou U: he hāpara, he hāpara rānei. Mā te hāpara e whakapirihia ana ki te pou ka āwhina i te pumau o ngā taiapa mā te whakanui ake i te horahanga pa ki te whenua. He māmā ake te patu i te pou kāhore he hāpara ki te whenua i te mea he hāpara.