Features: brand new and high quality Made of aluminum alloy material, anodized surface, anti-deformation, anti-rust, sturdy and durable, easy to install, firm and stable. ABS non-slip shim ensures strong grip on the umbrella, adjustable size. CNC integrated molding, high precision and long life. Angle 360 degree rotation adjustable, can move the umbrella to the left or right, forward or backward, flexible use. The gears are tightly engaged up and down, not easy to slip, durable and more sturdy and stable. Easy to install with quick-release clamp, for about 2-3cm/0.79-1.18inches diameter rod on the fishing chair. Specifications: Material: Aluminum Alloy Color: Black Red/Silver Gray Red Package Weight: approx.165g Length1: approx.11cm/4.33in Length2: approx.20.5cm/8.07in Diameter: approx.3cm/1.18in Package Includes: 1Pc x Fishing Umbrella Holder note: Please allow 1-2cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!