ʻO nā ʻili ʻili alumini nā ʻili ʻoki kūikawā no nā mea alumini alumini. ʻOi aku ka paʻakikī o ka alumini ma mua o ka lāʻau, akā he mau hiʻohiʻona ʻē aʻe ka lāʻau, ʻo ia hoʻi, ʻoi aku ka nui o nā lāʻau a me ka paʻakikī ikaika, no laila pono e ʻoki i kēia mau ʻano ʻelua ʻano mea, maikaʻi loa. ʻokoʻa. ʻO ka ʻaoʻao alumini ʻike maka he ʻano niho trapezoidal flat, ʻo ke kihi rake he 6-10 degere, a he 0 degere ka huina o ka lau; no ka ʻoki ʻana i nā mea alumini, ʻo ia ʻano niho a me ka hoʻolālā kihi e pili pono ana i nā ʻano o ka alumini ma ke ʻano he mea; a ʻo nā ʻili lāʻau no ka ʻoki lāʻau, ʻo ia nā niho hema a me nā niho ʻākau, me ka ʻaoʻao mua o ka ʻoi aku ma mua o 15 degere, he 5-10 degere ka huina o ka lau, a he nui nā kihi hope a me nā kihi hoʻohuli nui. ʻO ia ʻano hoʻolālā wale nō e hiki ke hōʻoia i ka lawa ʻana o ka ʻoi o ka maka i ka wā e pili ana i nā fiber.