This is a size C Remastered Aeron seat pan. WIL L NOT FIT SIZE A OR SIZE B. ONLY INTENDED FOR USE ON THE REMASTERED AERON. But it will technically fit a classic with possibly none to minor modifications. Message if you need help. Condition: various scuffs, scratches, stains, and dirt on frame and mesh. No hip pivot bolts included — you will reuse your old ones.