This set contains the most popular colors of premium quality sewing thread. Silk Finish Cotton 18pc- 100% Egyptian long staple and mercerized cotton is colorfast, fade resistant, boil proof, shrink resistant and safe to iron. Soft and lustrous, great for machine and hand sewing, and excellent for applique. 164 yards per spool. Color numbers 0046, 0109, 0504, 0120, 1057, 0350, 1091, 0247, 0757, 1304, 0825, 1002, 1222, 2000, 3612, 0322, 1282, 4000.