SPECIFICATIONS : Main material : Aluminum alloy Material of bracket : Steel Material of deck: Frosted panel (waterproof) Material of wheel : PU Wheel’s size: 70x42mm Weight Limit 330 LBS (150KG) Do not exceed the weight limit. 2 Aluminum alloy is more solid, wear-resistant, drop-resistant and lightweight. Wider PU wheel with 608 bearings, not only can be get a smooth ride but also safe.It can be regarded as a hobby, a kind of exercise, an alternative tool instead of walking 3- INSTRUCTIONS AND WARNINGS - When you skate, you should wear protective gear. (Such as: elbow pads, knee pads, helmets, etc. Beginners should hold the wall, railings and other objects or in someone’s companion for the practice.Warm-up exercise should be done before skating to prevent joint and muscle damage.Please skate in a safe place. Before skating check the product on the screws, nuts and other parts are missing, is solid before sliding. If this product is damaged or other abnormalities, please stop using it immediately.In order to ensure the superior performance of the product, it is recommended to use the original accessories.