Craft County Bonnie Cord is a great cord for knitting, crocheting, macramé and more! Bonnie cord is a heat-fusible cord, meaning to fuse two ends together heat each end up and then hold them together. This is a 100% polyolefin fiber cord. The diameter of this cord is 4 millimeters. Works for wall hangings, decorations, ornaments, basket weaving, hanging lights and much more! There are a variety of colors available in lengths of 100 yards. Suggested crochet hook size N13/9mm. Care: hand wash dry flat do not bleach do not iron do not dry clean. This cord is USA Made.