Enhance your embroidery and sewing efficiency with this 12-pack of Janome pre-wound plastic bobbins, filled with 80 yards of high-quality 100 percent spun polyester white thread (60/2). Designed for compatibility with most Janome top and front-loading machines (excluding MB4, 1600P series), these user-friendly bobbins also fit other sewing machines that accept Class 15 and 15J bobbins. Ideal for both professional embroidery and free-motion work, they offer a convenient, ready-to-use threading solution that saves time and ensures smooth performance. Pre-wound Bobbins with White Thread: Each bobbin is pre-wound with 80 yards of 100 percent spun polyester thread, ideal for professional-quality embroidery and free-motion sewing. Universal Compatibility: Compatible with all Janome top and front-loading machines except the MB4 and 1600P series. Also fits most machines using Class 15 and Class 15J bobbins. Convenient and Time-Saving: Pre-wound design eliminates the need to manually wind bobbins, making setup faster and sewing more efficient. High-quality Material: Made from durable plastic and filled with smooth, low-lint polyester thread to ensure consistent stitching performance. Compact and Lightweight: Pack includes 12 bobbins in a portable pack, each measuring 5.3 x 3.3 x 0.4 inches and weighing just 1.44 ounces.