Made of carbon steel 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:Black -Material:Carbon Steel -Size:2.00X2.00X0.50cm/0.79X0.79X0.20in -The surface is rigorous and smooth with high rotation speeds and is not easy to be hot. -Made of carbon steel 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. -Longboard 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: 8 x Skateboard Bearings