Features: This folding bike features adjustable deformation porous double stem, allowing you to adjust the width according to your specific needs. Make from aluminum alloy materials, anticorrosion, Enduring. It provide a strong structure while ensuring a comfortable Cycling experience. Hollows designs of this folding bike contributes to its overall light weight constructions. Equipped with a double systems, this bike ensures a smooth and efficient Cycling experience. It offer great performances and stability, allowing you to ride with confidences. Specifications: Materials: Aluminum Alloy Color: Black/Redness/Silver/Gold Size: As Shown in the Picture Mouth Diameter: About 25.4mm/1in Package Includes: 1pc Folding Bike Porous Stem note: Please allow 1-2cm errors due to manual measurement, make surely that you not mind before order. Due to difference between different monitors, the picture may not reflect the actual color.