The Herman Miller Classic Aeron Chair Replacement Seat Pan S83V02 Glacier Size B is a high-quality, durable seat pan designed specifically for office use. Made of plastic and manufactured in the United States, this seat pan is a stylish and ergonomic choice for operator/task chairs. The product is not a custom bundle and has not been modified, ensuring compatibility with the original Aeron Chair design. It is important to note that this seat pan includes a California Prop 65 Warning, indicating its compliance with state regulations regarding chemical safety.