The thick steel plate is stable like Taishan the bottom plate is reinforced with steel plate it can bear 100kg the sliding is safer and the heavy-duty bearing is more durable. Racing class protective shell upgrade 5 triangle stable while wearing high-strength protective shell protect the baby unbreakable resistant to falling wearable! Manufacturered by YUMEIGE. Four-speed adjustment 4-speed adjustment suitable for 85-150CM the height of the body can be easily adjusted by the telescopic aluminum alloy rod to adapt to the baby's height. The stable bearing structure of the triangle is stable it is really stable the triangular stable structure the stability of the body is easier to grasp the balance. Scooter disassembly four-wheel flash use safe and environmentally friendly materials without any additives such as butter glue and other toxic substances.