This product is a lot of 5 new cones of sewing thread, designed for use with overlock machines. The thread is made of polyester and comes in 4 different colors: 2 blue, white, black, and yellow. Each cone contains 3,000 yards of thread. The brand of the thread is either OVERLOCK or SURELOCK, and the unit of sale is a lot. This product is ideal for sewing projects and crafts.