This unit supports A4, A5, A6, Executive, Folio, JIS B5, Letter, Legal, Oficio and Statement sizes. Paper (16 to 47 lb., 60 to 176 gsm), transparencies, card stock and labels may be used from this tray. Envelopes in sizes 7¾, 9, 10, B5, C5 and DL may also be used from this tray.The optional caster base may be required when the product is configured with the spacer or additional trays (1 to 4). Go to www.lexmark.com/multifunctionprinters for more information.Paper size, paper and tray-present and tray-low and tray-empty sensing are supported.