The Maxi-Lock Cone All Purpose Thread is ideal to use for all kinds of sewing projects. This highly durable thread is made of 100 percent polyester for the Serger and other regular sewing machines. It's designed to endure high speeds and tension in the sewing process. Each spool of this sewing thread measures up to 3000 yards and will be a great addition to your sewing kit. Gütermann is the original manufacturer of the Maxi-Lock® serger thread since 1993. Brand: Maxi-Lock 50 weight Maxi-Lock® has excellent seam strength, consistent sewability, mildew and UV light tolerant, and shrink and abrasion resistant Each spool contains 3,000 yard of thread Composition: 100% polyester