Brother 500 Sheet Lower Paper Tray
The LT-7000 lower tray units expand the paper input source capacity. Up to three LT-7000 units can be installed to provide a total paper input capacity of 2100 sheets (3 x LT-7000 at up to 500 sheets per cassette + the standard paper cassette at up to 500 sheets + the standard multi-purpose tray at up to 100 sheets)
Brother LT-7000, 500 sheets
Brother LT-7000. Maximum capacity: 500 sheets