Kayayyakin haɗin polyester masu ƙarfi, masu jure damuwa waɗanda aka samar ta amfani da hanyoyi da tsare-tsare na musamman. Juriyar Matsi Mai Girma; Ƙarfi Mai Girma; Ƙarfin Gas Mai Ƙarfi; Kwanciyar Hankali Mai Kyau Ana amfani da shi sosai a cikin Kwalbar Abin Sha Mai Carbon; Kwalbar Ƙarfin Babban; Kwalbar Giya.