This gear set is compatible with Singer sewing machines and serves as a suitable replacement for feed gears. Made from high-quality materials, it is designed for durability and reliable performance. The set includes the following components: - 174491 large feed shaft gear - 174488 long feed transmission gear - 163997 hook transmission gear - 163328 vertical shaft top gear The long feed transmission gear (174488) is compatible with Singer models: 1030, 1036, 1425, 1482, 1485, 1486, 1488, 1490, 1492, 2000, 2001, 2005, 2010, 2102, 2105, 2106, 2108, 2110, 2112, 2114, 2118, 2210, 2302, 2303, 2304, 2315, 2330, 2404, 2430, 2502, 2503, 2504, 2515, 2530, 2623, 2638, 2662, 2712, 2718, 2722, 2724, 2730, 2732, 501, 502, 503, 507, 509, 510, 513, 514, 518, 522, 527, 530, 533, 534, 538, 543, 553B, 554B, 560, 6100, 6102, 6104, 6105, 6106, 720, 724, 734, 737, 740, 750, 755, 756, 758, 760, 763, 764, 770, 774, 775, 776, 778, 800, 8100, 813, 814, 830, 834, 900-3, 920-3, 925, 935U, 9410, 9417. It may also replace models 153490, 313920, and 422408. The large feed shaft gear (174491) fits Singer models: 290, 495, 500, 501, 502, 503, 507, 509, 510, 513, 514, 518, 522, 527, 530, 533, 534, 538, 543, 553B, 554B, 714, 720, 724, 734, 737, 740, 750, 755, 756, 758, 760, 763, 764, 770, 774, 775, 776, 778, 800, 813, 814, 830, 834, 838, 844, 900-3, 920-3, 925, 1021, 1022, 1030, 1036, 1221, 1425, 1482, 1485, 1486, 1488, 1490, 1492, 2000, 2001, 2005, 2010, 2102, 2105, 2106, 2108, 2110, 2112, 2114, 2118, 2210, 2302, 2303, 2304, 2315, 2330, 2404, 2430, 2502, 2503, 2504, 2515, 2530, 2623, 2638, 2662, 2712, 2718, 2722, 2724, 2730, 2732, 6102, 6104, 6105, 6106, 6110, 6120, 6130, 6136, 6146, 6152, 6156, 6174, 6184, 7100, 7101, 7102, 7104, 7105, 7106, 7108, 7110, 7136, 7171, 7174, 935U, 9618. It may also replace models 177491 and 422325. The hook transmission gear (163997) is compatible with Singer models: 417, 502, 518, 620, 625, 628, 629, 630, 635, 636, 638, 639, 640, 646, 648, 649, 714, 717, 750, 755, 756, 758, 770, 774, 775, 776, 778, 834, 900-3, 920-3, 925, 935U, 1036, 1200, 2000, 2001, 2005, 6704, 6705. Constructed from durable plastic, this gear set is lightweight, with a total weight of 75 grams. Each component is precisely engineered to ensure smooth operation and proper function within compatible sewing machine models.