glass fiber yarn with pvc bag has good insulation and corrosion resistance ,strong heat-resistance,and high mechanical strength. glass fiber yarn with pvc bag use glass sphere as raw materi.It has good ... yarn.Specification:6tex,12tex,27tex,33tex,normally1-strand,2strand,3strand,4strand,6strand,8strand.Other specification can be produced per customers requirments glass fiber yarn with pvc bag ...