Pack of 10 Loose 3/8" inch Tungsten Carbide Ball Bearings, Ball is made of tungsten carbide, Balls size is 3/8" inch (9.53mm), 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: 3/8" Loose Balls
• Size: 3/8" (0.375" inch)
• Grade: G25
• Hardness: 90 Rockwell
• Sphericity: 0.000025"
• Material: Tungsten Carbide
• Quantity: 10 Loose Balls