Description:Good quality, durable, long service life, easy to install, widely used in various machinery.Our high-quality bearings can minimize your replacement frequency and maintenance costs.Made of zinc alloy material, it is durable and solid.There are more different sizes and you can choose one fit you.It is suitable for many occasions, such as inline skates, and scooters.Item Name: BearingMaterial:Zinc AlloySize Details:Size: 10mm/0.39", 12mm/0.47", 15mm/0.59", 17mm/0.67", 20mm/0.79", 25mm/0.98", 30mm/1.18", 35mm/1.38", 8mm/0.31" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 X Pillow Block Bearing