Singer Sewing Notions (Set of 36)

This set of 36 class 15J transparent plastic bobbins. The bobbins come in a plastic storage box, which is reusable and easy to store. Consult your sewing machine’s manual to ensure the correct bobbin size. Use the transparent bobbins beneath the needle plate in automatic sewing machines to wind the thread for your embroidery projects. Never add a thread to a partially wound bobbin, as it may be uneven and cause the thread to tangle or break.