Description: Pack of 20 Steel Bobbins for Bernina Sewing Machines. Bernina bobbin # 330.026.03 (33002603) Bobbin size : 22.0mm diameter X 6.5mm thick These are high quality bobbins made of all steel with holes on both sides. For Bernina 117, 217, 217N, 540, 640 (Not Arista) , 640-2, 740, 750, 840, 850, 940, 950 machines and more