... % Poly core spun sewing thread100% cotton, cotton firber40/3, 20/3, 20/3*8, 20/2*3, ... super low elongation3 no knots, especially the cement seam yarn4 raw white or bleach, to day, to wax, to clearstarch as ... conner S and Z twist, single and twine6 color: black, raw white, blance, rice white, bright red, yellow, sapphire blue, purplish ...