Includes 3-pack of Coats & Clark Dual Duty XP General Purpose Poly Thread S930 500 Yds White. Coats & Clark-Dual Duty XP General Purpose Thread. This thread combines advanced technology from Coats with nearly 200 years of thread-making experience. Product is polyester-wrapped core-spun construction creating a thread that provides enhanced seam appearance and makes sewing trouble free. Smooth and strong it sews perfectly on all machines from vintage to todays most advanced. Length: 500 yards.