(100 pieces) pgn - 5mm (0.197") precision chrome steel bearing balls g25 (non magnetic) pgn bearings <br><b>quantity per package:</b> 100 pcs <br> <br><b>grade:</b> 25 <br><b>material:</b> chrome steel (aisi 52100) <br><b>diameter:</b> 5 millimeters (0.19685" inches) <br><b>weight:</b> 0.0180 ounces (0.51046 grams) <br><br> pgn’s g25 5mm chrome steel balls extremely precise and smooth surface guarantees you won't find any defects, such as flats, pits, soft spots, and cuts.