Ezi zinto zilandelayo zizixhobo eziqhelekileyo zokuthambisa kunye neemeko zabo ezifanelekileyo:
I-1. I-Polyvinyl chloride (PVC): inexabiso eliphantsi, ineepropathi zombane ezilungileyo kunye noomatshini, kodwa ukumelana nobushushu obuhlwempuzekileyo. Ilungele iindawo ngokubanzi.
I-2. I-Polythylene (PE): Inokuchasana nobushushu obufanelekileyo kunye nokunganyangeki kwekhemikhali, kwaye ilungele indawo ephezulu.
III. Umnqamlezo -}}}} i-polythylene (i-XLPE): ihambelana neendawo ezigqwesileyo zombane kunye nokuchasana nobushushu, kwaye kufanelekile} iintambo zevolthi.
I-4. Irabha: Ine-elasticings egqwesileyo kwaye inxibe ukunganyangeki, kwaye ilungele iimeko ezihamba rhoqo okanye ngaphandle.
V
