Features These bearings can provide high‑speed and quiet rotation and provide more effective support for the roller equipment. The ball bearing has a compact structure, stable operation and can provide a larger load. The bearing is made of stainless steel, which is resistant to high temperature and corrosion. The bearing has low friction coefficient, low starting and running torsion, and relatively stable performance. These bearings has a wide range of applications, and is used in conjunction with skateboards, longboards, inline skates, roller skates, and electric skateboards. Specification: Item Type: Ball Bearings Material: Stainless steel Model: S628Z Size(Inner Diameter x Outer Diameter x Height): Approx. 8 x 24 x 8mm / 0.3 x 0.9 x 0.3in Package List: 10 x Ball Bearings Package List 10 x Ball Bearings