Aurifil Cotton Forty3 thread. 40 wt 3ply 3,280 yards, thread made specifically to handle the rigor of today's high-speed, high tech, Longarm machines. It has all the versatility and lustrous color of the original 40wt, with the added benefit of extra strength. It is currently available in 73 of our Cotton colors. This thread is perfect for longarm quilting, but is also a star for garment sewing, bag-making, domestic machine sewing, and more.