Melrose-Trilobal Polyester Thread Assortment: New Basics. This thread is ideal conventional and industrial machine stitching. The superior coverage and excellent tensile strength result in smooth and consistent embroidery runs. This 7-1/2x 9inch x 3.2cm package contains twenty-four 600 yard double snap spools of 40 weight 100% polyester thread in assorted colours. Imported.