TFBOY 10 Pack of Centaur Transparent Bobbins for Singer 2010 4613 4617 4623 4663 6234 9124 Centur style bobbin. Plastic bobbin with metal center. fit Singer sewing machine models: 4613, 4617, 4623, 6230, 6234, 6235, 6276, 6268, 7005, 7043, 9113, 9117, 9124, 9133, 9137, 9143, 9217, 9224, 9240, 9430, 9900, Etc. Quantity: 10