709A-5D (Lift and Stretch) Office Furniture Chrome-plated Multifunctional Armrest Chair Parts - 5D is an office chair accessory. It is chrome-plated and has good corrosion resistance. The armrest has 5D multifunctional adjustment function, which can be adjusted up and down, front and back, left and right, rotated and stretched according to the user's sitting posture and needs, providing all-round comfortable support. The lift and stretch design allows users to flexibly adjust the armrest position during use, reduce arm fatigue, and improve office comfort and efficiency. It is a practical and humanized design component in modern office furniture.