... polyester yarn250D,300D,500D1000d,1500d,2000d,3000d spun polyester yarn Specification:commonly used (english count): 6s,8s,10s, ... ,where they need use yarn or twine:flour mills, Fertilizer plant,cement plant,construction siteand other industrial field.The products ... all can reach no knot, especially the cement seam yarn,hasadvanced technolygy, ...