Last one Super low price for OEM. Please note the size of your seat. T his is a size SMALL size A also labelled ONE DOT on the seat bottom also on your seat and seat back. OEM Herman Miller Classic Aeron Seat Pan Part / Replacement Size A (Noted on seat bottom as “One Dot”) This is a RARE Graphite (not Black) BL1 Genuine Original Herman Miller part. You can measure you. Size in pictures: 19″ across the widest points and 18 1/2″ from back to front. This is a Size SMALL (one dot) replacement seat. Please be sure to check your chair for correct size. Please review all pictures as they are part of the description and.