Fits models: Singer 290, 290C, 600, 603, 604, 620, 625, 626, 628, 629, 630, 635, 636, 638, 639, 640, 645, 646, 648, 649, 700, 706, 708, 720, 726, 728, 737, 750, 758, 755, 756, 770, 775, 778, 1000G, 1040G, 1060, 1411N, 1411U, 1425N, 1425U, 1000, 1040, 1060, 1411, 1411, 1425, 1425
Outside diameter: 27.4mm - Height: 7.1mm - Axis diameter 2.2mm