Replacement Seat for Herman Miller Classic Aeron Size B Medium, Graphite. [Compatible with Classic Aeron Size B Only] Designed to fit Herman Miller Classic Aeron Chair Size B Medium. Not compatible with Remastered models. [Full Mesh Seat Replacement] Complete seat assembly with tensioned black mesh to replace worn, sagging, or torn seats. [Exact Dimensions for Proper Fit] Measures 20.25 inches wide x 18 inches deep x 5.8 inches high for accurate alignment with the original frame. [Durable Graphite Mesh] Strong suspension mesh provides firm ergonomic support and maintains airflow during long sitting periods. [Easy Installation] Pre assembled seat includes instructions for straightforward replacement. No additional hardware required. Product Sourcing & Fulfillment Policy. We are committed to transparency, reliability, and earning your trust. Below is a clear overview of how we source and deliver our products. Quality Control: Every product is carefully selected and reviewed before listing. We ensure accurate descriptions, specifications, and condition details. We respond quickly and professionally. Carrier delays or routing changes. We appreciate your understanding in these situations. Please review all item details carefully before purchasing. Damaged or Non-Functional Items. If your item arrives damaged or not working. Provide clear photos and details. Your satisfaction is very important to us. Thank you for shopping with us! We truly appreciate your support and look forward to serving you again. Your support means everything to our business.