Inner Bore Diameter 8 mm; Outer Diameter 22 mm; Thickness 7 mm. Steel cage evenly spaces balls for reduced friction, vibration, and noise, and is shields on both sides to protect against contaminants and retain lubrication. Great for skateboards, inline skates, roller skates, scooters, and other skating applications, also available for 3D printer wheel beas, CNC, etc. Colour: silver + black Material: metal Package Contents: 20 Ball Bea.The item "30X20Pcs 608 2RS Ball Beas ILQ-9 High-Speed Beas for Skateboards Inline Skates" is in sale since Tuesday, July 6, 2021. This item is in the category "Sporting Goods\Outdoor Sports\Skateboarding & Longboarding\Skateboard Parts\Bearings". The seller is "directimports1899" and is located in Pennsylvania. This item can be shipped worldwide.