31-K bobbin case/bobbin

Designed specifically for 31-K leather sewing machines.
Ensures smooth and consistent thread delivery for precise stitching.
Durable metal construction for long-lasting performance.
Precision-engineered bobbin case helps maintain proper thread tension.
High-quality bobbin provides reliable thread winding and feeding.
Easy to install, remove, and maintain.
Suitable for sewing leather, canvas, upholstery, and other heavy materials.
Helps reduce thread breakage and skipped stitches.
Essential replacement parts for maintaining optimal machine performance.
Ideal for leather workshops, upholstery businesses, and industrial sewing applications.

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