Singer 12ct Class 15 Transparent Bobbins Sewing Notion (Set of 12)

This set of 12 class 15 transparent plastic bobbins serve as replacements. Consult your 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.