Hana ʻia ia e ka mea lawe mai AISI 304 a i ʻole AISI 316L nona ke kūpaʻa corrosion kiʻekiʻe, ke kūpaʻa wela kiʻekiʻe a me ka waiwai mechanical kūpono, ua hoʻohana nui ʻia no ka ea ea waena, ʻōnaehana paipu kūloko a pēlā aku.
Loaʻa ka "U" convol-ution profile ma ke ʻano he pitch maʻamau no ka pae kiʻekiʻe a me ka maʻalahi.Mālama ka hose i kahi hoʻolālā patent ʻokoʻa me ke kūpaʻa kiʻekiʻe a me ka hoʻokomo maʻalahi.