Ko te Bimetallic extruded finned tube making machine ka whakamahia ki te hanga i te ngongo whai kiko me te here pai ki te ngongo e whakarato ana i te tino pai me te roa.Ahakoa te ratonga taratara, te teitei o te mahana, te taiao kino ranei, ko te ngongo whai koha te mea pai rawa atu mo nga tono whakawhiti wera.