ʻO ka pepa kila galvanized prepainted i loko o ka coil he mea maʻamau i hoʻohana ʻia me ke kūpaʻa corrosion maikaʻi loa a me ka hoʻokumu ʻana i nā waiwai maikaʻi, no laila ua hoʻohana nui ʻia ia i ke kūkulu ʻana, ka lawe ʻana, nā uila, a me nā mea ʻē aʻe. ʻO ka pepa galvanized, "X" e hōʻike ana he pepa ʻōwili wela ka substrate, "51″: helu serial, ʻaʻohe manaʻo kikoʻī, ma ka inoa o ka hoʻohana maʻamau.