From Superior Threads In Omni Variegated 40wt 2000yd DESCRIPTION This 2-ply variegated poly wrapped poly core thread is for high speed sewing and works well as a top or bobbin thread. Great for quilting and decorative stitching. For home machine needles, manufacturer recommends 90/14 needles. For long arm machines, manufacturer recommends #18 (mr4.0) needles.