... for all fabrics, socks kniitng and overlocking purposes. 1.20/2, 20/3, 20/4, 20/6, 20/9, 30/2, 30/3, 40/2, 40 ... change. 3. excellent strength-suitable for high speed sewing machine. 4. High strength, Low CV, low shrinkage. 5. ring twisted thread ...