1. Bearing Specification:6002Z Deep Groove Ball Bearing (Inner Dia.15mm / 0.60', Outer Dia.32mm / 1.26', Thickness9mm / 0.35'). 2. Where Is It Used?: Rolling Bearings Use Rolling Elements To Maintain The Spacing Between Moving Parts, It With a Small Friction Coefficient And a High Limit Speed. Rolling Bearings Is Suitable For Skateboards Bearing, 3D printers, Inline Skates, Long boards, Scooters, Fidget Spinners, Motor, Bike, Pool Pump, Lawn Mower, Wheelbarrows, Carts Hand Trucks Wheel. Great for Electric Motor Applications. 3. Great Quality: Oil Reference Speed 23000 rpm. Grease Reference Speed 17000 rpm. Steel cage evenly spaces balls. Good stability, compatible with low speed / high speed rotation, smooth rolling. Removable single lip seals on both sides to protect against contaminants and retain lubrication. thereby reducing friction, vibration and noise. This ball bearing is great for skateboarding, inline skating and other skating applications, thereby increasing the life of the wheel. 4. Material: Singlerow Radial Ball Bearings Use Highcarbon Steel, Double Rubber Sealed Miniature, Reliable, And Long Working Life.