Description-New 100 ct class 66 plastic bobbins-Outside diameter: 20.5mm - Height: 10.8mm - Axis diameter 6.2mm-Fits Singer models 66, 400, 431G, 500, 800 series, 935U, 1021, 1022, 1247, 1263, 1280, 1288, 1730, 1862, 2100 series, 2210, 2430, 2440, 2500 and 2600 series, 2700 series, 2950, 30920, 3102, 3103, 3270, 4530, 4538, 4610, 4830, 4832, 5017, 5028, 5040, 5050, 5417, 5430, 57815, 57817, 57820, 57825, 5805, 5808, 5812, 5814, 5816, 5818, 5825, 5830, 5838, 5910, 6012, 6100 series, 6201, 6202, 6211, 6212, 6214, 6215, 6221C, 6233, 6244, 6620, 7004, 7011, 7028, 7029, 7033, 7035, 7101, 7102, 7105, 7108, 7110, 7136, 7146, 7174, 7184, 7211, 7212, 8109, 8134, 8209,8214, 8220, 8222, 8234, 8502, 8505, 8518, 8602, 8605, 8606, 8610, 8614, 8618,8734, 8834, 9005, 9008, 9010, 9015, 9018, 9020, 9022, 9027, 9030, 9032, 9034, 9044, 9110, 9130, 9134, 9210, 93220, 9323, 93234, 9334, 9410, 9416, 9420,9416,9420, 9423, 9430, 9432, 9444, 9500, 9502, 9505, 9518, 9602, 9605, 9606, 9608, 9610, 9612, 9614, 9618, 9802, 9803, 9805, 9806, 9808, 9810, 9812, 9814, 9816, 9818, 9824, 9828, 9832, 9836, 9850, 9852, 9852-1, 9853-1, 9855, 9855-1, 9858, 9858-1, 9860, 9936, CG500, CG550, CG590, CM17, CP17, DX-14C, FM17 & FM22 (old & new), HD102, HD105, HD110, SM14