Sulky Metallic Thread is round, foil-wrapped thread. It is smooth, strong, pliable and easy to sew. Perfect for sergers, sewing machines and hand work and it is washable and dry cleanable. Snap-open spools open and close to hold and release thread ends. Details: Gold with red and green accents 750 yards Snap open spool Washable For best results use Size 14/90 machine needle