Features: It adopts a rotary design, which can be adjusted in multiple directions. You can choose the angle that suits you and fix it, which is simple and convenient. Made of all aluminum alloy, CNC machined by CNC lathe, the appearance is smooth, the lines are full, high quality. Two sizes are available, the largest can be expanded to 34 mm, and the smallest can be expanded to 18 mm, with strong versatility. Anti-rust and anti-corrosion, weatherproof, waterproof, shockproof, dustproof, sturdy and durable. These brackets are made from aluminum alloy and coated with an abrasion resistant powder coat to ensure years of use in the harshest conditions. Package Includes: 1x Light Bar Bracket Specifications: Material:Aluminum Alloy Size:Approx.6.3x5.5cm/2.48x2.16inches Size:Approx.6.7x5.75cm/2.63x2.26inches Color:Black/Silver note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings.