Used backrest taken off a Remastered Aeron. FITMENT: WILL ONLY FIT ON SIZE C CHAIRS. WILL NOT FIT ON SIZE B OR SIZE A. Features: adjustable PostureFit SL. Condition: blemishes on frame, ranging from scuffs to nicks to scratches. Some slight yellowing of areas, such as the PostureFit SL control knobs. No STRUCTURAL issues such as cracked plastics or torn mesh. No hardware included; reuse your old backrest bolts.