Stainless steel ball material: AISI 304 & 304L & 316 & 316L AISI 420 & 420C & 430 & 440 C & 440 Diameter range: 1.588 mm to 50.8 mm Grade: ISO3290 / G40-G1000 Applications: Widely used in medical equipment, chemical industry, aviation, plastic hardware, perfume bottles, spray valves, nail polish, switches, washing machines, refrigerators, air conditioners, pharmaceutical materials, auto parts, bearings, etc.