This 25 piece pre-wound bobbin thread set size A class 15 SA156 with 60WT 70D/2 polyester filament and a clear plastic storage case is designed for sewing and embroidery machines. High tenacity polyester bobbin thread provides smooth stitching and helps reduce lint buildup inside the bobbin case during machine operation. Compatible with many home and commercial sewing machines, including Brother, Babylock, Janome, Juki, Elna, Quantum Futura, and Singer models. Suitable for embroidery work, sewing projects, garment stitching, quilting, craft sewing, and DIY fabric sewing applications. This set contains 25 prewound bobbin threads in size A class 15 SA156 with 60WT 70D/2 polyester filament and a clear plastic storage case designed for sewing and embroidery machines. The high tenacity polyester thread provides smooth, consistent stitching while helping reduce lint buildup in the bobbin case during machine use. Compatible with many home and commercial sewing machines including Brother, Babylock, Janome, Juki, Elna, Quantum Futura, and Singer models. Suitable for embroidery, garment stitching, quilting, craft sewing, and various DIY fabric sewing projects.