1. Inani elikhulu lee-cores, zonke izakhiwo ezithintela amanzi omileyo, akukho mafutha okuzalisa, zicocekile kwaye ziyakhawuleza ngexesha lokwakha, kwaye azinampembelelo kwindalo esingqongileyo.
2. I-high modulus glass fiber reinforced plastic rod (FRP) central reinforcement.
3. Ifilimu egqunywe ngamacala amabini egqunywe nge-corrugated steel tape armour inokuphucula ngempumelelo ukumelana noxinzelelo olusecaleni lwentambo ye-optical.