Thread kit includes 10 spools of neutral thread from Fil Tec and the Snap n Stack storage box. Fil Tec thread is made in the USA and is a very high quality thread. Use it for piecing, quilting and embroidery. Get a sample pack and try it for yourself. These are the large (1100 yards) spools of thread. Snap n Stack technology allows you to add-on additional trays as needed. Great for storing thread. Get 10 spools of thread in neutral colors. You will love this thread.