A. Dimensions - Diameter: 70 mm, width: 24 mm, inner diameter: 8 mm. They are suitable for most inline skates, scooters, and skateboards. It is recommended to ensure they are compatible with the inline skates you purchased. B. The inline skate wheels are made of elastic and wear-resistant polyurethane (PU), which can cushion vibrations and impacts and are not prone to breakage. They also provide grip, allowing you to skate with reduced risk of slipping. C. Applicable scenarios - These skate wheels are suitable for beginners and can be used both indoors and outdoors. They are appropriate for daily practice, recreational activities, skating competitions, and figure skating. D. Packaging content - It includes eight replacement wheels, which can meet the needs of a pair of skates and satisfy your usage requirements. E. The elastic material makes skating easy and quiet. It is suitable for indoor daily practice and casual skating, being practical and convenient. F. Color: Black G. Material: Polyurethane (PU) + metal H. Packaging content: 8 inline skate wheels I. Only the above packaging contents are included, and other products are not part of the package. J. Note: Light and different displays may cause slight differences between the color of the item and the actual object. A measurement error of +/- 1 - 3 cm is acceptable.