<br><b>Quantity per Package:</b> 500 Pcs <br><br><b>Diameter:</b> 3/8, 0.375 inches (9.525 millimeter) <br><b>Weight:</b> 0.12529 ounces (3.5519 grams) <br><br> PGN’s 3/8" Steel Balls extremely precise and smooth surface guarantees you won't find any defects, such as flats, pits, soft spots, and cuts.