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.