Masu siyayya koyaushe suna zaɓar madaurin polyester PET saboda yana ba da ƙarfi mara misaltuwa, aminci, da ingancin farashi don aikace-aikacen marufi masu nauyi. Wannan kayan daɗaɗɗen yanayi, wanda aka fi sani da madaurin ƙarfe na filastik, yana ba da ƙarfin juzu'i mai tsayi daga brea 160-1360 kg.