ʻO ke koʻokoʻo hoʻoheheʻe uila ke kila (electric heating tube) he paipu metala e like me ka pūpū, a ua māhele like ʻia nā wili uila hoʻomehana uila (nickel-chromium, iron-chromium alloy) ma ke koʻi waena o ka paipu. Hoʻopiha ʻia nā āpau a hoʻopili ʻia me ka pauka magnesium oxide me ka insulation maikaʻi a me ka conductivity thermal. Hoʻopaʻa ʻia nā ʻaoʻao ʻelua me ka silica gel a i ʻole nā mea seramika. Hiki ke hoʻohana nui ʻia kēia mea hoʻomehana uila metala no ka hoʻomehana ʻana i ka wai, aila, ea, nitrate solution, acid solution, alkali solution a me nā metala hoʻoheheʻe haʻahaʻa (aluminium, zinc, tin, babbitt alloy), Loaʻa iā ia nā pōmaikaʻi o ka maikaʻi hoʻomehana maikaʻi. , ka wela like ole, ka pale wela kiʻekiʻe, ka pale ʻana i ka corrosion, a me ka hana palekana maikaʻi.