Features 1000pcs Metal Balls: Including 1000pcs solid carbon steel balls with a diameter of 7mm, has sufficient quantity for easy use and replacement. Corrosion Resistant Carbon Steel Material: These beads are made of an excellent carbon steel material with high hardness and wear resistance, not easy to corrode or deform. Glossy Surface: These bearing balls have a glossy and burr free surface that will not hurt your hands or wear other equipment when using them. Easy to Replace: These 7mm metal balls are good replacement parts for bearing accessories, suitable for industrial equipments. Fine Processing: With precise machining, these 7mm diameter precision steel bearing balls have standard dimension and good stiffness for long life and practicality. Specification: Item Type: Roller Balls Material: Carbon Steel Size: Approx. 7mm / 0.28in Applicable: Bearing Accessories Package List: 1000 x Carbon Steel Balls Note: Store in dry or airtight conditions. Package List 1000 x Carbon Steel Balls