10 154GAS 151x21 for Union special 39500 39600 Singer 990 Curved Needles 75's
154GAS 154g 151x21 for Union special 39500, 39600 Singer 990b. INDUSTRIAL SEWING OVERLOCKING CURVED MACHINE NEEDLES FLAT ON ONE SIDE FOR THE THREE THREAD 39500. CURVED OVERLOCKER SEWING MACHINE NEEDLES.