Wayar TW/THW ta kasance mai ƙarfi ko madaidaici, mai jan ƙarfe mai laushi mai laushi wanda aka keɓance da Polyvinylchloride (PVC).
Wayar TW tana tsaye don igiyar thermoplastic, waya mai jure ruwa.
Wayar THW ita ma thermoplastic ce, waya mai jure ruwa, amma tana da juriya da zafi, wanda H da sunan ke nunawa.