201 2D armrest office chair/gaming chair parts are accessories designed to improve the comfort and practicality of the chair. The 2D armrest supports up and down height and left and right angle adjustment, which allows users to freely adjust according to their needs and provides more ergonomic support. Made of durable materials, it is wear-resistant and stable. The armrest design is flexible and can be adapted to a variety of office chairs and gaming chairs, and is easy to disassemble and replace.