The Herman Miller Aeron Classic Replacement Backrest in Size A is a brand new office chair backrest designed for the Aeron model in a sleek 3D01 color. This high-quality replacement part is perfect for maintaining the comfort and support of your office chair, ensuring a ergonomic and stylish seating solution for your workspace. Designed by Herman Miller, a renowned brand in office furniture, this backrest is a reliable and functional addition to any office setting.