Cassette Feeding Unit-AW1, for iR ADV DX 4945i / 4935i/ 4925iCassette Feeding Unit-AW1 for iR ADV DX 4945i / 4935i/ 4925iSupports up to A3Paper Capacity: 550 sheets x 2 (1,100 sheets) (80 gsm)Paper Weight: 52 to 256 gsm