1. Chiwerengero chachikulu cha ma cores, mawonekedwe onse owuma otsekera madzi, opanda mafuta odzaza, oyera komanso othamanga panthawi yomanga, komanso osakhudzidwa ndi chilengedwe.
2. High modulus glass fiber reinforced plastic rod (FRP) central reinforcement.
3. Filimu yokhala ndi mbali ziwiri yokhala ndi mbali ziwiri yokhala ndi malata achitsulo amatha kusintha bwino kukana kwa chingwe cha kuwala.