23 DEEP-HARDENED STEEL BEARING BALLS, TEMPERED CARBON STEEL BEARING BALLS, FERROUS METAL BEARING BALLS, BRASS BEARING BALLS, BRONZE BALLS, NON-FERROUS METAL BEARING BALLS. STAINLESS STEEL BEARING BALLS, CHROME STEEL BEARING BALLS, CARBON STEEL TUMBLING BALLS FOR USE IN BARREL FINISHING OPERATIONS FOR BURNISHING AND/OR DEBURRING CASTINGS, MACHINE PARTS, AND THE LIKE