Material: 40s/2 polyester sewing thread, combining the strength of polyester with the look of cotton. The common weight is perfect for sewing machines, embroidery machines, overlock machines, sewing supplies, hand sewing, and other craft projects. Thread Pack: 4 spools of 3000 yards each, totaling 12,000 yards. This spool size fits most sewing machines, quilting machines, overlock machines, and sergers. No special conical spool holder needed. Care Instructions: Avoid prolonged sun exposure. Color: White Material: Polyester Size: 11.5 x 6.5 cm Package Contents: 4 x Polyester Sewing Thread 40/2 Note: Light reflection and different displays may cause the color of the item in the picture to differ slightly from the actual color. Measurement error is +/- 1-3cm.