Pack of 100 Loose 1/8" inch Tungsten Carbide Ball Bearings1/8" inch = 0.125" inch G25100 Loose BallsPack of 100 Loose 1/8" inch Tungsten Carbide Ball Bearings, Balls are made of tungsten carbide, Balls size is 1/8" inch (3.175mm), Grade is G25, And it meets grade 25 sphere tolerancem, Loose Ball is extremely hard alloy made from tungsten and carbon And it is high corrosion wear resistance.Item: 1/8" Loose BallsSize: 1/8"(0.125" inch)Grade: G25Hardness: 90 RockwellSphericity: 0.000025"Material: Tungsten CarbideQuantity: 100 Loose Balls