Bliss by Barbara Persing thread kit of 10 small (164 yard) spools of 40 Weight 100% cotton Mako thread from Aurifil. Includes the following colors: 2515, 1243, 2582, 2725, 1147, 2145,1135, 2135, 2425 & 2452. Long staple Egyptian cotton is the best in the world! The 40 weight is one of the most known counts, slightly heavier than 50 weight, this thread is perfect for general machine quilting, embroidery, patchwork and hand piecing, bobbin lace and buttonholes. 100% mercerized cotton.