1. Inani elikhulu lama-cores, sonke isakhiwo sokuvimbela amanzi omile, akukho mafutha okugcwalisa, ahlanzekile futhi ayashesha ngesikhathi sokwakhiwa, futhi akukho mthelela endaweni ezungezile.
2. High modulus glass fiber reinforced plastic rod (FRP) central reinforcement.
3. Ifilimu enezinhlangothi ezimbili ezisongwe ngobude embozwe insimbi kathayela yezikhali zethayiphu ingathuthukisa ngempumelelo ukumelana nengcindezi esemaceleni yekhebula lokukhanya.