High quality material: durable, impact resistance, good wear resistance and long service lifeHigh flexibility: smooth pass, flexible steering, easy jumpingHigh anti-slip: pattern etching on the wheel, good grip, effective anti-slipMade of PU material. Clear texture, anti-skid, high-elastic and good grip. You can roll over more pebbles and cracks, and skate with confidence Great for any skill level, even better for beginners because of the softer ride.Color: BlackMaterial: PUSize: 52x32mmPackage Contents:4 x Skateboard WheelsOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.