The Lexmark 25B2950 2,100-Sheet Tray supports A4, A5 (long edge first), Folio, Letter, Legal and Oficio size | Only Paper 60 to 135gsm may be used from this unit | Install below any other trays | Paper size, paper and tray-present and tray-low and tray-empty sensing are supported | If the printer configuration contains the 2,100-Sheet Tray, the optional caster base is required | The Lexmark printer spacer cannot be used with this 2100-Sheet Tray