New Singer Threaded Class 15 Bobbins Black and White 12 Count Polyester 42145 Singer Threaded Class 15 Bobbins come in a convenient 12-count pack featuring six black and six white bobbins. Each bobbin is pre-wound with 50 yards of 100% spun polyester thread, designed to be both washable and colorfast for long-lasting sewing projects. These essential sewing machine accessories are housed in a clear, reusable storage case to keep your workspace organized. Compatible with most sewing machines that utilize Class 15 bobbins, this set provides high-quality thread for basic repairs, garment construction, and crafting. Measurements: • Thread Length: 50yd per bobbin • Total Thread: 600yd total Singer sewing machine bobbins, Singer Class 15 bobbins, Class 15 prewound bobbins, pre wound bobbins, white sewing thread, black sewing thread, polyester thread, Singer sewing accessories, sewing machine thread, bobbin refill set, sewing supplies, quilting thread, embroidery thread, replacement bobb