Features: Made of premium titanium and iron, stable and durable. Deep groove ball bearings. These bearings are prelubricated with grease. Selection of metal material, good quality, long service life. Smooth operation, low friction, high performance and long life. Applications: skateboards, inline skating, scooter. Specification: Material: Titanium, iron Color: yellow Type: yellow ABEC9 Size(outer diameter*inner diameter*height): 22*8*7mm0.9*0.3*0.28in Weight: Approx. 94g Package List: 8 x Skateboard Bearing .Made of premium titanium and iron, stable and durable. Deep groove ball bearings.? These bearings are prelubricated with grease. Selection of metal material, good quality, long service life. Smooth operation, low friction, high performance and long life. Applications: skateboards, inline skating, scooter.