Premium Replacement / Genuine Large Capacity Steel Spool (B01215MMN / B9117563000 / 16408 / 510007). Made of high-quality steel in Japan by Towa, this spool features a 28.0mm diameter and 11.8mm width, providing durable, long-lasting performance. Ideal for industrial sewing machines, it ensures smooth thread feeding, consistent stitching, and reliable operation for heavy-duty and professional sewing applications.