Hardness: 82A for a durable grip whether on a gutter, sidewalk or street. Performance: smooth, comfortable and durable, let you find more pleasure. Usage: Suitable for double row skateboard and skateboard, roller skates. Suitable for many occasions, indoors, outdoors, on asphalt roads, parks, etc. Material: Made of polyurethane and polypropylene, durable, the light is bright and not dim. Tips: The bearing must be pressed firmly to make the product emit light, otherwise it will not emit light. Features: 82A hardness: gives you durable grip whether on a rink, sidewalk or on the street. High performance: smooth, comfortable and durable, allowing you to find more pleasure. Usage: suitable for double row skating and skateboarding, roller skates. Material: Made of PU and PP material, durable, the light is bright and not dim. Occasions: Suitable for many occasions, indoors, outdoors, parks. TIPS: The bearing must be pressed firmly to make the product emit light, otherwise it will not emit light. Features: Material: polyurethane and polypropylene. Color: blue Dimensions: approximately 5.8 x 3.2 cm (diameter x width). Bearing: 608RS high speed. Core: LED light. Hardness: 82 A. Application: double skating, skateboarding. Resilience: 80% Content: 4 luminous wheels. Note: 1. Due to the light and screen difference, the item's color may be slightly different from the pictures. 2. Since measurements are taken by hand, the sizes indicated may vary by 0.5-2 cm. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.