Features: Made of high quality aluminum alloy, durable, lightweight, wear-resistant and solid. High performance folding bike with teeth stem adjustable folding riser stem. Specifications: Brand: CNC Product name: Folding car standpipe Material: aluminum alloy Color: black silver Package Contents: 1*Folding Head Tube Our products are made of environmentally friendly materials, safe and non-toxic, and will not cause harm to the human body. Please read the product manual carefully before purchasing, and use it correctly according to the operation steps. If you encounter any difficulties or problems during use, please contact us in time, we will solve them for you as soon as possible. Your support is the driving force for us to move forward, and we look forward to sharing your experience and experiences with us. For the quality problems or defects of the product itself, we will provide unconditional return or repair service.