309-5D (Button Version) 5D Hardware Chrome Black Adjustable Armrest Part is a very practical furniture part. It is made of hardware material with a hard texture, ensuring the stability and durability of the armrest. The surface is chrome-plated, showing an elegant black color, and has anti-corrosion properties. The button version design is convenient for users to operate and adjust the armrest easily. As a 5D part, it can achieve multi-dimensional adjustments, such as height, angle, and front and back position. Whether used on office chairs or other furniture, it can provide comfortable support for the user's arms to meet the usage habits and physical needs of different people.