50 Pack of Class 66 Plastic Bobbins Fits Singer models 247AP, 288, 353, 354, 413K13, 502, 507, 509, 510, 513, 514, 518, 522, 527, 530, 533, 534, 538, 560, 714, 717 School, 719, 724, 734, 774, 776, 830, 834, 844, 935U, 1022, 1247, 1263, 1280, 1288, 1802, 1803, 1812, 1852, 1853, 1862, 1872, 1873, 2210, 2302, 2303, 2304, 2315, 2330, 2404, 2430, 2440, 2502, 2503, 2504, 2515, 2517, 2530, 2732, 2950, 3101, 3102, 3103, 3105, 3314, 3317, 3343, 4325, 4522, 4525, 4526, 4528, 4530, 4538, 4552, 4562, 4572, 4610, 4620, 4622, 4825, 4828,