This metal bobbin works with Singer models 66, 99, 101, 185, 192, 201, 247, 288, 327, 328, 329,401, 403, 404, 413, 416, 418, 466,,476, 477, 478, 513,514, 518, 522, 527, 533, 534, 538, 560, 714, 717, 719,734, 774, 776, 814, 834, 4610, 6212, 6214, 6215, 6217,6233, 6100, 6700, 7100, 8100 and other drop in bobbin machines.

These bobbins are sold individually for your convenience.~