Product size about :As shown in the figure Product material: nylon  Long-lasting and Sturdy: The main body of the gyroscopic cup holder is made of upgraded nylon material, which has super toughness, is strong and Sturdy, and can effectively resist various collisions and frictions in daily use. Its service life far exceeds that of ordinary cup holders, providing a long-term and stable cup placement solution for your travel Adjust as you Like: The innovative 360° rotating design allows the cup holder to be adjusted at any angle to meet your needs in different scenarios. Whether it is a stroller, bicycle, wheelchair, walker, or scooter, it can be easily installed in different positions to bring you a convenient drinking experience Enlarged Adjustable Caliber: The cup holder has an enlarged adjustable caliber, which can adapt to the diameter of 1.9-4.2CM. The large-caliber fixed design is compatible with more round tubes. Whether it is a slender bicycle handle or a slightly thicker wheelchair armrest, it can fit tightly and be placed stably Easy Installation: The quick-release knob design is adopted. Without the help of any tools, installation and removal can be completed by hand, saying goodbye to tedious installation steps. Even the elderly and children can easily operate it, allowing you to adjust the position of the cup holder according to your needs at any time  -AFTER-SALES SUPPORT: If you have any questions or concerns about our products, please feel free to contact us. We will be happy to serve you and ensure your satisfaction. Precautions: 1. As we all know , the different computers display colors differently, the color of the actual item may vary slightly from the following images. 2. If you feel difficult to choose the size, you can contact us at any time. We will give you some suggestions, but for your reference only. Package Included: 1 pcs Cup Holder