The set contains 25 prewound bobbins, size A (SA156), 90WT (60S/2), each measuring 0.47 x 0.79 inch, stored in a clear plastic case for organization. Compatible with most embroidery and sewing machines, including Brother, Babylock, Janome, Juki, Elna, Singer, and Quantum Futura. Made for smooth stitching and consistent thread tension, suitable for embroidery and sewing projects. Clear storage box keeps bobbins neatly arranged and prevents tangling or thread waste during work. This set includes 25 size A (SA156) prewound bobbins, each measuring 0.47 x 0.79 inch and wound with 90WT (60S/2) thread, stored in a clear plastic case for easy organization. Designed for smooth stitching and consistent thread tension, they are ideal for embroidery and sewing projects. Compatible with most embroidery and sewing machines such as Brother, Babylock, Janome, Juki, Elna, Singer, and Quantum Futura. The storage case keeps bobbins neatly arranged and helps prevent tangling or thread waste during use.