The Herman Miller Aeron Chair Replacement Backrest 3D02 Size B is a new office chair backrest designed for operator/task chairs. Made of durable plastic, this backrest is a genuine replacement part manufactured in the United States by Herman Miller. With a sleek design and the brand’s reputation for quality, this product offers comfort and support for office use. Though it may have some scuffs, this backrest is a reliable choice for those looking to maintain or update their office furniture. Price was significantly reduced since this is a new item with scuffs.