The Herman Miller Aeron Backrest B Size 3D02 OEM is a brand new replacement part specifically designed for the Aeron chair, known for its high quality and ergonomic design. This backrest is made by Herman Miller, a reputable brand in the office furniture industry, ensuring a perfect fit and compatibility with the Aeron chair model. Ideal for those looking to maintain the functionality and style of their Aeron chair, this OEM backrest is a reliable and durable option for office use.