3,280yd cone SoFine! #50 can be used for quilting, general sewing, clothing construction, and serger. Home Machines: Topstitch #80/12. Set tension to 4.0-5.0 Longarm Machines: #16 (MR 3.5). Reduce tension as necessary. It is a smooth thread with an even twist. There are no slubs and no lint buildup. Available in 134 colors.