The Aerofil 120 – Solid Color Assortment Box includes 18 220-yard (200m) (200m) spools of 40-weight Madeira Aerofil Polyester Quilting & Sewing Thread Each spool comes with dual thread locks, ensuring neat and tidy storage Designed to meet the diverse needs of modern sewing enthusiasts, this thread is suitable for both machine and hand stitching Aerofil boasts a smooth, lint-free finish that effortlessly glides through fabric layers, minimizing friction and eliminating the risk of snagging