YLI Wonder Invisible Thread is just what you need for stitching out that hand look quilting stitch! Or check our blog for a great tip on why it's ideal for sewing on scout or similar patches! Perfect for beading or couching so your connecting thread doesn't show. Works in the top of your machine, bobbin or serger! .004mm, 1500 yard spool. It's one of those sewing notions you always want to have on hand!