17 Popular Sulky 30 Wt. Cotton Blendables thread on 500 yd. spools. Sulky Cotton Blendables Thread are the only multicolor threads that are a masterful blend of different colors within the same range of tone and intensity, with random, subtle color changes every 2-1/2 to 5 inches! This is the ideal thread for hand and machine quilting, appliqué, embroidery and thread painting. The package is made even better because we send them to you in the Universal Slimline Box which is the perfect storage box for all of your Sulky threads.