Size - Diameter: 70mm, width: 24mm, bearing bore diameter: 8mm. Compatible with most inline skates, caster boards, and skateboards. Please verify compatibility with your skates before purchase. High-Quality Material - These inline skate wheels are made of high-elasticity, wear-resistant PU material, offering better shock absorption and vibration reduction. The wheels are less prone to cracking and provide excellent grip for safe skating without slipping. Applications - Ideal for beginners, these wheels perform well both indoors and outdoors. Suitable for daily practice, recreational skating, skating competitions, and artistic skating. Package Includes - 4 replacement wheels, sufficient for one pair of roller skates. Meets standard replacement needs. The high-elastic material ensures smooth, quiet movement. Perfect for indoor use, daily practice, and recreational skating. Durable and practical. Color: Black Material: PU + Metal Size: 70mm x 24mm Package Contents: 4 x Inline Skate Wheels Note: Light and screen display differences may cause slight variations in color between the image and the actual item. Measurement error allowance: +/- 1-3cm.