This set includes 20 bobbins designed for use with various sewing machines. Each bobbin is compatible with models such as the 180, 185, 190, 200, 435, 450, 640, 730E, 1000, and 1630. These bobbins are suitable for use with machines like the Aurora 435 and 450, as well as the Artista 180, 185, 190, 200, 640, and 730E. The package provides a convenient supply of bobbins for sewing projects, ensuring smooth operation and reliable thread management. Crafted to fit specific machine models, these bobbins are essential accessories for maintaining sewing efficiency. The set offers a practical solution for replacing or stocking up on bobbins, making sewing tasks more seamless. Each bobbin is designed to meet the needs of various sewing machine models, providing versatility and convenience for your sewing activities.