... of steel ball Materials: AISI E52100Grade: Grade10 to Grade1000 Size:1/4"Complying to: ISO3290 reasonable pricechrome steel balls made of standard ... . AISI Type 52100 Chrome Steel Balls SIZE RANGE0.50mm (1/32") up to 1-1/2" GRADES:, 10, 25, 50, 100, 500, 1000, 2000 ... LBS./CU.IN. PHYSICAL CHARACTERISTICS CORROSION RESISTANCENO CORROSION RESISTANCE MAGNETIC 1/4" steel ball coppered