Singer Bullet BobbinsItem:8228Singer Sewing Machine Models:27, 28, 28K1, 28K2, 28K3, 28K4, 127-3, 127-4, 127-12, 127-14, 127K, 127K1, 127K2, 127K3, 127K4, 128, 128-4, 128-8, 128K