Danyen abu na siliki core tube substrate ne high-yawa polyethylene, ciki Layer yi amfani da mafi ƙarancin gogayya coefficient silica gel m mai mai. Yana da juriya na lalata, bangon ciki mai santsi, watsa iskar gas mai dacewa, da ƙarancin gini. Dangane da buƙatun, nau'i daban-daban da launuka na ƙananan bututu suna maida hankali ne ta hanyar casing na waje. Ana amfani da samfuran zuwa tsarin sadarwar sadarwar kebul na gani don titin kyauta, layin dogo da sauransu.