Product features: wear-resistant, silent, load-bearing, dual bearings, flexible rotationMaterial: PU, metal; black; maximum load capacity: 80kg (2 wheels)Dimensions: weight and height 50 x 18mm, bearing diameter: 21mm inner bearing and diameter: 6mm, wheel diameter: 50mmPackage content: 2 x wheels, 2 x axles, 2 x screws, 2 x wrenches, 4 x washersAbout this product: This Alisa wheel is designed to be the best substitute comptiable with your wheeled suitcase, without worrying about damage caused by long-term use or wear. About shlpping: All items will be shlpped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances.Any questions, please feel free to contact us During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours, wish you a happy shopping Thanks comptiable with your cooperation and we"ll make you feel satisfied.