Size - Diameter: 70mm, width: 24mm, bearing bore: 8mm. Compatible with most inline skates, casterboards, and skateboards. Please verify compatibility with your skates before purchasing. High-Quality Material - Made of high-elasticity, wear-resistant PU with a metal core. Offers improved shock absorption, durability, and grip for safer skating with reduced slipping risk. Applications - Ideal for beginners, providing a smooth and stable ride on indoor and outdoor surfaces. Suitable for daily practice, recreational skating, artistic skating, and training. Package Includes - 8 inline skate wheels, sufficient for one pair of roller skates. Designed for easy replacement and practical use. High-tech elastic material ensures quiet, smooth, and effortless movement. Well-suited for indoor training and casual skating. Color: Black Material: PU + Metal Package Contents: 8 x Inline Skate Wheels Note: The package includes only the items listed. Other accessories are not included. Note: Slight color variations may occur due to lighting and screen display differences. Measurement may vary by +/- 1-3cm.