Made of metal material, high protection and long durability. A great replacement for increased strength and durability. Universal for skateboards, , inline skates, electric skateboards etc. Take them . Bearings are suitable for skateboards, , inline skates, scooters, yo- or other skating applications and toys. Features -Color:Multi -Material:High carbon chromium steel -Size:2.00X0.60X0.60cm/0.79X0.24X0.24in -The surface is rigorous and smooth with high rotation speeds and is not easy to be hot. -Made of metal material with high protection and long durability, they are strong and durable. -This type of bearing usually needs to be lubricated with grease fittings, which will make it rotate more smoothly. - Bearing for high speeds and minimal friction. It is very useful. -They feature high load bearing, low noise and high speeds. Choice for skating. Package list: 4 x Skateboard Bearings