Specifications:Ball Diameter: 10mm (0.39")Precision Grade: ±0.02mmMaterial: 304 Stainless SteelPackage Contents:Based at the optionsDescriptions:304 Stainless Steel is probably the most broadly used stainless steel. It is austenitic stainless-steel and has a higher corrosion resistance than regular steel.201 Stainless Steel is the cheapest type of stainless steel. It is tough in bloodless environments but has lower corrosion resistance. 201 stainless-steel is the most popular preference for functions that require low cost, high durability, and no subject for exposure to corrosive elements316L Stainless Steel also is austenitic stainless steel. It presents greater corrosion resistance than 304.Material - Made of 304 stainless steel. Good corrosion resistance, warmth resistance, low-temperature energy and mechanical properties. The material itself isn't magnetic, but if made into spheres it's weakly magnetic.Features - Wide vary of applications(maintain commercial equipment or use for relatives DIY projects); Cost-effective(can repair present products)Applications - Maintain product that makes use of metallic balls, comparable to ball bearings, turntable, drawer slides, casters, door locks; DIY tasks like a keychain, or adding weight for your projects, etc.Notice: Please verify the Ball Diameter you're ordering.