flying saucer balls: large quantity in stock with competitive price Specification: 3.5*5.5, 4.5*6.5, 6*8, 8*12. Flying Saucer ball, which looks like a flying saucer or UFO dish, is widely used for hardware defects polished, especially for irregular workpiece polished. Chemical composition(%)CSiMnSPCrNiCu≤0.07-0.150.35-0.5512.5-14.2≤0.0230.02713.2-14.50.8-2.01.82