Specifications:Ball Diameter(mm): 0.9 1 1.2 1.8 2 2.381 2.5 2.8 3 3.175 3.5 4 4.45 4.5 4.763 5 5.5 6 6.35 6.75 7 8 9.525 10mmPrecision Grade: ±0.02mmMaterial: Solid Brass (H62)Package Contents:Based on the optionsDescriptions:Made of brass. Good corrosion re-sistance, heat re-sistance, low-temperature power and mechanical properties.They are used in a good selection of purposes adding special valves, industrial pumps and valves, digital devices, safety switches, heating units, appliances, furnishings rails. They are utilized in the automotive, digital and petrochemical industry.Notice: Please verify the Ball Diameter you're ordering.