HDPE cluster tube sabon nau'in micro-cable kariyar hannun riga ne, wanda ya haɗu 7-rami 25/21 sub-tube a wata hanya.Layer na waje yana kunshe da babban kumfa polyethylene mai girma 3.0mm, wanda za'a iya saukar da shi a cikin iyakataccen sarari.Ƙarin ramukan bututu da kariya na ƙananan bututu.