This pack includes 25 class 15 sewing machine bobbins SA156 made from durable plastic, each measuring 0.8 inch in diameter and 0.45 inch in height, with a clear storage case. The standard size design is compatible with most sewing machines and suitable for sewing, quilting, and embroidery projects. The transparent plastic construction supports smooth thread movement, helps reduce tangles, and allows easy monitoring of thread levels during use. The clear storage case features individual slots to keep bobbins organized, easy to access, and ideal for home sewing rooms or craft spaces. This set contains 25 class 15 sewing machine bobbins SA156 made from durable plastic, each measuring 0.8 inch in diameter and 0.45 inch in height, along with a clear storage case. The standard size fits most sewing machines and works well for sewing, quilting, and embroidery projects. Transparent plastic allows smooth thread flow, reduces tangling, and makes it easy to check thread levels. The storage case includes individual slots to keep bobbins neatly organized and easily accessible in sewing rooms or craft spaces.