Features:OOTDTY brand new and excessive qualityMade of steel, strong and durable.Suitable for roller skate skateboard, mini kick scooter, trike, inline skates, roller skates, spinner and more.High quality, excessive speed, low friction, it'll provide you with a smoother feeling.Easy to disassemble and clean and for protection from dirt, dust, Pre-lubricated with lubricant to lengthen the lifetime of the bearing and maintainOptimize load and decrease frictional heat.Specifications:Material: SteelSize: Approx.22x7mm/0.86x0.27inDiameter: Approx.8mm/0.31inColor: Black, Red(optional)Package Includes:8x Sports Skateboard BearingsNote:1.Please allow 1-2cm mistakes thanks to manual measurement, just be sure you do not mind before you order.2.Due to the difference between diversified monitors, the picture won't replicate the particular coloration of the item.